diff --git a/absl/time/internal/cctz/BUILD.bazel b/absl/time/internal/cctz/BUILD.bazel
index 8abc804..6e17874 100644
--- a/absl/time/internal/cctz/BUILD.bazel
+++ b/absl/time/internal/cctz/BUILD.bazel
@@ -83,9 +83,15 @@
 
 ### tests
 
-test_suite(
-    name = "all_tests",
-    visibility = ["//visibility:public"],
+cc_library(
+    name = "test_time_zone_names",
+    testonly = True,
+    srcs = ["src/test_time_zone_names.cc"],
+    hdrs = ["src/test_time_zone_names.h"],
+    copts = ABSL_DEFAULT_COPTS,
+    linkopts = ABSL_DEFAULT_LINKOPTS,
+    visibility = ["//visibility:private"],
+    deps = ["//absl/base:config"],
 )
 
 cc_test(
@@ -140,6 +146,7 @@
     ],
     deps = [
         ":civil_time",
+        ":test_time_zone_names",
         ":time_zone",
         "//absl/base:config",
         "@googletest//:gtest",
@@ -164,6 +171,7 @@
     tags = ["benchmark"],
     deps = [
         ":civil_time",
+        ":test_time_zone_names",
         ":time_zone",
         "//absl/base:config",
         "@google_benchmark//:benchmark_main",
diff --git a/absl/time/internal/cctz/src/cctz_benchmark.cc b/absl/time/internal/cctz/src/cctz_benchmark.cc
index ba7e149..7733792 100644
--- a/absl/time/internal/cctz/src/cctz_benchmark.cc
+++ b/absl/time/internal/cctz/src/cctz_benchmark.cc
@@ -23,6 +23,7 @@
 #include "benchmark/benchmark.h"
 #include "absl/time/internal/cctz/include/cctz/civil_time.h"
 #include "absl/time/internal/cctz/include/cctz/time_zone.h"
+#include "absl/time/internal/cctz/src/test_time_zone_names.h"
 #include "absl/time/internal/cctz/src/time_zone_impl.h"
 
 namespace {
@@ -103,498 +104,10 @@
 const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z";
 const char RFC1123_no_wday[] = "%d %b %Y %H:%M:%S %z";
 
-// A list of known time-zone names.
-// TODO: Refactor with src/time_zone_lookup_test.cc.
-const char* const kTimeZoneNames[] = {"Africa/Abidjan",
-                                      "Africa/Accra",
-                                      "Africa/Addis_Ababa",
-                                      "Africa/Algiers",
-                                      "Africa/Asmara",
-                                      "Africa/Bamako",
-                                      "Africa/Bangui",
-                                      "Africa/Banjul",
-                                      "Africa/Bissau",
-                                      "Africa/Blantyre",
-                                      "Africa/Brazzaville",
-                                      "Africa/Bujumbura",
-                                      "Africa/Cairo",
-                                      "Africa/Casablanca",
-                                      "Africa/Ceuta",
-                                      "Africa/Conakry",
-                                      "Africa/Dakar",
-                                      "Africa/Dar_es_Salaam",
-                                      "Africa/Djibouti",
-                                      "Africa/Douala",
-                                      "Africa/El_Aaiun",
-                                      "Africa/Freetown",
-                                      "Africa/Gaborone",
-                                      "Africa/Harare",
-                                      "Africa/Johannesburg",
-                                      "Africa/Juba",
-                                      "Africa/Kampala",
-                                      "Africa/Khartoum",
-                                      "Africa/Kigali",
-                                      "Africa/Kinshasa",
-                                      "Africa/Lagos",
-                                      "Africa/Libreville",
-                                      "Africa/Lome",
-                                      "Africa/Luanda",
-                                      "Africa/Lubumbashi",
-                                      "Africa/Lusaka",
-                                      "Africa/Malabo",
-                                      "Africa/Maputo",
-                                      "Africa/Maseru",
-                                      "Africa/Mbabane",
-                                      "Africa/Mogadishu",
-                                      "Africa/Monrovia",
-                                      "Africa/Nairobi",
-                                      "Africa/Ndjamena",
-                                      "Africa/Niamey",
-                                      "Africa/Nouakchott",
-                                      "Africa/Ouagadougou",
-                                      "Africa/Porto-Novo",
-                                      "Africa/Sao_Tome",
-                                      "Africa/Timbuktu",
-                                      "Africa/Tripoli",
-                                      "Africa/Tunis",
-                                      "Africa/Windhoek",
-                                      "America/Adak",
-                                      "America/Anchorage",
-                                      "America/Anguilla",
-                                      "America/Antigua",
-                                      "America/Araguaina",
-                                      "America/Argentina/Buenos_Aires",
-                                      "America/Argentina/Catamarca",
-                                      "America/Argentina/Cordoba",
-                                      "America/Argentina/Jujuy",
-                                      "America/Argentina/La_Rioja",
-                                      "America/Argentina/Mendoza",
-                                      "America/Argentina/Rio_Gallegos",
-                                      "America/Argentina/Salta",
-                                      "America/Argentina/San_Juan",
-                                      "America/Argentina/San_Luis",
-                                      "America/Argentina/Tucuman",
-                                      "America/Argentina/Ushuaia",
-                                      "America/Aruba",
-                                      "America/Asuncion",
-                                      "America/Atikokan",
-                                      "America/Atka",
-                                      "America/Bahia",
-                                      "America/Bahia_Banderas",
-                                      "America/Barbados",
-                                      "America/Belem",
-                                      "America/Belize",
-                                      "America/Blanc-Sablon",
-                                      "America/Boa_Vista",
-                                      "America/Bogota",
-                                      "America/Boise",
-                                      "America/Cambridge_Bay",
-                                      "America/Campo_Grande",
-                                      "America/Cancun",
-                                      "America/Caracas",
-                                      "America/Cayenne",
-                                      "America/Cayman",
-                                      "America/Chicago",
-                                      "America/Chihuahua",
-                                      "America/Ciudad_Juarez",
-                                      "America/Coral_Harbour",
-                                      "America/Costa_Rica",
-                                      "America/Coyhaique",
-                                      "America/Creston",
-                                      "America/Cuiaba",
-                                      "America/Curacao",
-                                      "America/Danmarkshavn",
-                                      "America/Dawson",
-                                      "America/Dawson_Creek",
-                                      "America/Denver",
-                                      "America/Detroit",
-                                      "America/Dominica",
-                                      "America/Edmonton",
-                                      "America/Eirunepe",
-                                      "America/El_Salvador",
-                                      "America/Ensenada",
-                                      "America/Fort_Nelson",
-                                      "America/Fortaleza",
-                                      "America/Glace_Bay",
-                                      "America/Goose_Bay",
-                                      "America/Grand_Turk",
-                                      "America/Grenada",
-                                      "America/Guadeloupe",
-                                      "America/Guatemala",
-                                      "America/Guayaquil",
-                                      "America/Guyana",
-                                      "America/Halifax",
-                                      "America/Havana",
-                                      "America/Hermosillo",
-                                      "America/Indiana/Indianapolis",
-                                      "America/Indiana/Knox",
-                                      "America/Indiana/Marengo",
-                                      "America/Indiana/Petersburg",
-                                      "America/Indiana/Tell_City",
-                                      "America/Indiana/Vevay",
-                                      "America/Indiana/Vincennes",
-                                      "America/Indiana/Winamac",
-                                      "America/Inuvik",
-                                      "America/Iqaluit",
-                                      "America/Jamaica",
-                                      "America/Juneau",
-                                      "America/Kentucky/Louisville",
-                                      "America/Kentucky/Monticello",
-                                      "America/Kralendijk",
-                                      "America/La_Paz",
-                                      "America/Lima",
-                                      "America/Los_Angeles",
-                                      "America/Lower_Princes",
-                                      "America/Maceio",
-                                      "America/Managua",
-                                      "America/Manaus",
-                                      "America/Marigot",
-                                      "America/Martinique",
-                                      "America/Matamoros",
-                                      "America/Mazatlan",
-                                      "America/Menominee",
-                                      "America/Merida",
-                                      "America/Metlakatla",
-                                      "America/Mexico_City",
-                                      "America/Miquelon",
-                                      "America/Moncton",
-                                      "America/Monterrey",
-                                      "America/Montevideo",
-                                      "America/Montreal",
-                                      "America/Montserrat",
-                                      "America/Nassau",
-                                      "America/New_York",
-                                      "America/Nipigon",
-                                      "America/Nome",
-                                      "America/Noronha",
-                                      "America/North_Dakota/Beulah",
-                                      "America/North_Dakota/Center",
-                                      "America/North_Dakota/New_Salem",
-                                      "America/Nuuk",
-                                      "America/Ojinaga",
-                                      "America/Panama",
-                                      "America/Pangnirtung",
-                                      "America/Paramaribo",
-                                      "America/Phoenix",
-                                      "America/Port-au-Prince",
-                                      "America/Port_of_Spain",
-                                      "America/Porto_Acre",
-                                      "America/Porto_Velho",
-                                      "America/Puerto_Rico",
-                                      "America/Punta_Arenas",
-                                      "America/Rainy_River",
-                                      "America/Rankin_Inlet",
-                                      "America/Recife",
-                                      "America/Regina",
-                                      "America/Resolute",
-                                      "America/Rio_Branco",
-                                      "America/Santa_Isabel",
-                                      "America/Santarem",
-                                      "America/Santiago",
-                                      "America/Santo_Domingo",
-                                      "America/Sao_Paulo",
-                                      "America/Scoresbysund",
-                                      "America/Shiprock",
-                                      "America/Sitka",
-                                      "America/St_Barthelemy",
-                                      "America/St_Johns",
-                                      "America/St_Kitts",
-                                      "America/St_Lucia",
-                                      "America/St_Thomas",
-                                      "America/St_Vincent",
-                                      "America/Swift_Current",
-                                      "America/Tegucigalpa",
-                                      "America/Thule",
-                                      "America/Thunder_Bay",
-                                      "America/Tijuana",
-                                      "America/Toronto",
-                                      "America/Tortola",
-                                      "America/Vancouver",
-                                      "America/Virgin",
-                                      "America/Whitehorse",
-                                      "America/Winnipeg",
-                                      "America/Yakutat",
-                                      "America/Yellowknife",
-                                      "Antarctica/Casey",
-                                      "Antarctica/Davis",
-                                      "Antarctica/DumontDUrville",
-                                      "Antarctica/Macquarie",
-                                      "Antarctica/Mawson",
-                                      "Antarctica/McMurdo",
-                                      "Antarctica/Palmer",
-                                      "Antarctica/Rothera",
-                                      "Antarctica/Syowa",
-                                      "Antarctica/Troll",
-                                      "Antarctica/Vostok",
-                                      "Arctic/Longyearbyen",
-                                      "Asia/Aden",
-                                      "Asia/Almaty",
-                                      "Asia/Amman",
-                                      "Asia/Anadyr",
-                                      "Asia/Aqtau",
-                                      "Asia/Aqtobe",
-                                      "Asia/Ashgabat",
-                                      "Asia/Atyrau",
-                                      "Asia/Baghdad",
-                                      "Asia/Bahrain",
-                                      "Asia/Baku",
-                                      "Asia/Bangkok",
-                                      "Asia/Barnaul",
-                                      "Asia/Beirut",
-                                      "Asia/Bishkek",
-                                      "Asia/Brunei",
-                                      "Asia/Chita",
-                                      "Asia/Choibalsan",
-                                      "Asia/Chongqing",
-                                      "Asia/Colombo",
-                                      "Asia/Damascus",
-                                      "Asia/Dhaka",
-                                      "Asia/Dili",
-                                      "Asia/Dubai",
-                                      "Asia/Dushanbe",
-                                      "Asia/Famagusta",
-                                      "Asia/Gaza",
-                                      "Asia/Harbin",
-                                      "Asia/Hebron",
-                                      "Asia/Ho_Chi_Minh",
-                                      "Asia/Hong_Kong",
-                                      "Asia/Hovd",
-                                      "Asia/Irkutsk",
-                                      "Asia/Istanbul",
-                                      "Asia/Jakarta",
-                                      "Asia/Jayapura",
-                                      "Asia/Jerusalem",
-                                      "Asia/Kabul",
-                                      "Asia/Kamchatka",
-                                      "Asia/Karachi",
-                                      "Asia/Kashgar",
-                                      "Asia/Kathmandu",
-                                      "Asia/Khandyga",
-                                      "Asia/Kolkata",
-                                      "Asia/Krasnoyarsk",
-                                      "Asia/Kuala_Lumpur",
-                                      "Asia/Kuching",
-                                      "Asia/Kuwait",
-                                      "Asia/Macau",
-                                      "Asia/Magadan",
-                                      "Asia/Makassar",
-                                      "Asia/Manila",
-                                      "Asia/Muscat",
-                                      "Asia/Nicosia",
-                                      "Asia/Novokuznetsk",
-                                      "Asia/Novosibirsk",
-                                      "Asia/Omsk",
-                                      "Asia/Oral",
-                                      "Asia/Phnom_Penh",
-                                      "Asia/Pontianak",
-                                      "Asia/Pyongyang",
-                                      "Asia/Qatar",
-                                      "Asia/Qostanay",
-                                      "Asia/Qyzylorda",
-                                      "Asia/Riyadh",
-                                      "Asia/Sakhalin",
-                                      "Asia/Samarkand",
-                                      "Asia/Seoul",
-                                      "Asia/Shanghai",
-                                      "Asia/Singapore",
-                                      "Asia/Srednekolymsk",
-                                      "Asia/Taipei",
-                                      "Asia/Tashkent",
-                                      "Asia/Tbilisi",
-                                      "Asia/Tehran",
-                                      "Asia/Tel_Aviv",
-                                      "Asia/Thimphu",
-                                      "Asia/Tokyo",
-                                      "Asia/Tomsk",
-                                      "Asia/Ulaanbaatar",
-                                      "Asia/Urumqi",
-                                      "Asia/Ust-Nera",
-                                      "Asia/Vientiane",
-                                      "Asia/Vladivostok",
-                                      "Asia/Yakutsk",
-                                      "Asia/Yangon",
-                                      "Asia/Yekaterinburg",
-                                      "Asia/Yerevan",
-                                      "Atlantic/Azores",
-                                      "Atlantic/Bermuda",
-                                      "Atlantic/Canary",
-                                      "Atlantic/Cape_Verde",
-                                      "Atlantic/Faroe",
-                                      "Atlantic/Jan_Mayen",
-                                      "Atlantic/Madeira",
-                                      "Atlantic/Reykjavik",
-                                      "Atlantic/South_Georgia",
-                                      "Atlantic/St_Helena",
-                                      "Atlantic/Stanley",
-                                      "Australia/Adelaide",
-                                      "Australia/Brisbane",
-                                      "Australia/Broken_Hill",
-                                      "Australia/Canberra",
-                                      "Australia/Currie",
-                                      "Australia/Darwin",
-                                      "Australia/Eucla",
-                                      "Australia/Hobart",
-                                      "Australia/Lindeman",
-                                      "Australia/Lord_Howe",
-                                      "Australia/Melbourne",
-                                      "Australia/Perth",
-                                      "Australia/Sydney",
-                                      "Australia/Yancowinna",
-                                      "Etc/GMT",
-                                      "Etc/GMT+0",
-                                      "Etc/GMT+1",
-                                      "Etc/GMT+10",
-                                      "Etc/GMT+11",
-                                      "Etc/GMT+12",
-                                      "Etc/GMT+2",
-                                      "Etc/GMT+3",
-                                      "Etc/GMT+4",
-                                      "Etc/GMT+5",
-                                      "Etc/GMT+6",
-                                      "Etc/GMT+7",
-                                      "Etc/GMT+8",
-                                      "Etc/GMT+9",
-                                      "Etc/GMT-0",
-                                      "Etc/GMT-1",
-                                      "Etc/GMT-10",
-                                      "Etc/GMT-11",
-                                      "Etc/GMT-12",
-                                      "Etc/GMT-13",
-                                      "Etc/GMT-14",
-                                      "Etc/GMT-2",
-                                      "Etc/GMT-3",
-                                      "Etc/GMT-4",
-                                      "Etc/GMT-5",
-                                      "Etc/GMT-6",
-                                      "Etc/GMT-7",
-                                      "Etc/GMT-8",
-                                      "Etc/GMT-9",
-                                      "Etc/GMT0",
-                                      "Etc/Greenwich",
-                                      "Etc/UCT",
-                                      "Etc/UTC",
-                                      "Etc/Universal",
-                                      "Etc/Zulu",
-                                      "Europe/Amsterdam",
-                                      "Europe/Andorra",
-                                      "Europe/Astrakhan",
-                                      "Europe/Athens",
-                                      "Europe/Belfast",
-                                      "Europe/Belgrade",
-                                      "Europe/Berlin",
-                                      "Europe/Bratislava",
-                                      "Europe/Brussels",
-                                      "Europe/Bucharest",
-                                      "Europe/Budapest",
-                                      "Europe/Busingen",
-                                      "Europe/Chisinau",
-                                      "Europe/Copenhagen",
-                                      "Europe/Dublin",
-                                      "Europe/Gibraltar",
-                                      "Europe/Guernsey",
-                                      "Europe/Helsinki",
-                                      "Europe/Isle_of_Man",
-                                      "Europe/Istanbul",
-                                      "Europe/Jersey",
-                                      "Europe/Kaliningrad",
-                                      "Europe/Kirov",
-                                      "Europe/Kyiv",
-                                      "Europe/Lisbon",
-                                      "Europe/Ljubljana",
-                                      "Europe/London",
-                                      "Europe/Luxembourg",
-                                      "Europe/Madrid",
-                                      "Europe/Malta",
-                                      "Europe/Mariehamn",
-                                      "Europe/Minsk",
-                                      "Europe/Monaco",
-                                      "Europe/Moscow",
-                                      "Europe/Nicosia",
-                                      "Europe/Oslo",
-                                      "Europe/Paris",
-                                      "Europe/Podgorica",
-                                      "Europe/Prague",
-                                      "Europe/Riga",
-                                      "Europe/Rome",
-                                      "Europe/Samara",
-                                      "Europe/San_Marino",
-                                      "Europe/Sarajevo",
-                                      "Europe/Saratov",
-                                      "Europe/Simferopol",
-                                      "Europe/Skopje",
-                                      "Europe/Sofia",
-                                      "Europe/Stockholm",
-                                      "Europe/Tallinn",
-                                      "Europe/Tirane",
-                                      "Europe/Tiraspol",
-                                      "Europe/Ulyanovsk",
-                                      "Europe/Vaduz",
-                                      "Europe/Vatican",
-                                      "Europe/Vienna",
-                                      "Europe/Vilnius",
-                                      "Europe/Volgograd",
-                                      "Europe/Warsaw",
-                                      "Europe/Zagreb",
-                                      "Europe/Zurich",
-                                      "Factory",
-                                      "Indian/Antananarivo",
-                                      "Indian/Chagos",
-                                      "Indian/Christmas",
-                                      "Indian/Cocos",
-                                      "Indian/Comoro",
-                                      "Indian/Kerguelen",
-                                      "Indian/Mahe",
-                                      "Indian/Maldives",
-                                      "Indian/Mauritius",
-                                      "Indian/Mayotte",
-                                      "Indian/Reunion",
-                                      "Pacific/Apia",
-                                      "Pacific/Auckland",
-                                      "Pacific/Bougainville",
-                                      "Pacific/Chatham",
-                                      "Pacific/Chuuk",
-                                      "Pacific/Easter",
-                                      "Pacific/Efate",
-                                      "Pacific/Fakaofo",
-                                      "Pacific/Fiji",
-                                      "Pacific/Funafuti",
-                                      "Pacific/Galapagos",
-                                      "Pacific/Gambier",
-                                      "Pacific/Guadalcanal",
-                                      "Pacific/Guam",
-                                      "Pacific/Honolulu",
-                                      "Pacific/Johnston",
-                                      "Pacific/Kanton",
-                                      "Pacific/Kiritimati",
-                                      "Pacific/Kosrae",
-                                      "Pacific/Kwajalein",
-                                      "Pacific/Majuro",
-                                      "Pacific/Marquesas",
-                                      "Pacific/Midway",
-                                      "Pacific/Nauru",
-                                      "Pacific/Niue",
-                                      "Pacific/Norfolk",
-                                      "Pacific/Noumea",
-                                      "Pacific/Pago_Pago",
-                                      "Pacific/Palau",
-                                      "Pacific/Pitcairn",
-                                      "Pacific/Pohnpei",
-                                      "Pacific/Port_Moresby",
-                                      "Pacific/Rarotonga",
-                                      "Pacific/Saipan",
-                                      "Pacific/Samoa",
-                                      "Pacific/Tahiti",
-                                      "Pacific/Tarawa",
-                                      "Pacific/Tongatapu",
-                                      "Pacific/Wake",
-                                      "Pacific/Wallis",
-                                      "Pacific/Yap",
-                                      "UTC",
-                                      nullptr};
-
 std::vector<std::string> AllTimeZoneNames() {
   std::vector<std::string> names;
-  for (const char* const* namep = kTimeZoneNames; *namep != nullptr; ++namep) {
+  for (const char* const* namep = cctz::kTimeZoneNames; *namep != nullptr;
+       ++namep) {
     names.push_back(std::string("file:") + *namep);
   }
   assert(!names.empty());
diff --git a/absl/time/internal/cctz/src/test_time_zone_names.cc b/absl/time/internal/cctz/src/test_time_zone_names.cc
new file mode 100644
index 0000000..ab54c9a
--- /dev/null
+++ b/absl/time/internal/cctz/src/test_time_zone_names.cc
@@ -0,0 +1,515 @@
+// Copyright 2025 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+
+#include "absl/time/internal/cctz/src/test_time_zone_names.h"
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace time_internal {
+namespace cctz {
+
+// A list of known time-zone names.
+const char* const kTimeZoneNames[] = {"Africa/Abidjan",
+                                      "Africa/Accra",
+                                      "Africa/Addis_Ababa",
+                                      "Africa/Algiers",
+                                      "Africa/Asmara",
+                                      "Africa/Bamako",
+                                      "Africa/Bangui",
+                                      "Africa/Banjul",
+                                      "Africa/Bissau",
+                                      "Africa/Blantyre",
+                                      "Africa/Brazzaville",
+                                      "Africa/Bujumbura",
+                                      "Africa/Cairo",
+                                      "Africa/Casablanca",
+                                      "Africa/Ceuta",
+                                      "Africa/Conakry",
+                                      "Africa/Dakar",
+                                      "Africa/Dar_es_Salaam",
+                                      "Africa/Djibouti",
+                                      "Africa/Douala",
+                                      "Africa/El_Aaiun",
+                                      "Africa/Freetown",
+                                      "Africa/Gaborone",
+                                      "Africa/Harare",
+                                      "Africa/Johannesburg",
+                                      "Africa/Juba",
+                                      "Africa/Kampala",
+                                      "Africa/Khartoum",
+                                      "Africa/Kigali",
+                                      "Africa/Kinshasa",
+                                      "Africa/Lagos",
+                                      "Africa/Libreville",
+                                      "Africa/Lome",
+                                      "Africa/Luanda",
+                                      "Africa/Lubumbashi",
+                                      "Africa/Lusaka",
+                                      "Africa/Malabo",
+                                      "Africa/Maputo",
+                                      "Africa/Maseru",
+                                      "Africa/Mbabane",
+                                      "Africa/Mogadishu",
+                                      "Africa/Monrovia",
+                                      "Africa/Nairobi",
+                                      "Africa/Ndjamena",
+                                      "Africa/Niamey",
+                                      "Africa/Nouakchott",
+                                      "Africa/Ouagadougou",
+                                      "Africa/Porto-Novo",
+                                      "Africa/Sao_Tome",
+                                      "Africa/Timbuktu",
+                                      "Africa/Tripoli",
+                                      "Africa/Tunis",
+                                      "Africa/Windhoek",
+                                      "America/Adak",
+                                      "America/Anchorage",
+                                      "America/Anguilla",
+                                      "America/Antigua",
+                                      "America/Araguaina",
+                                      "America/Argentina/Buenos_Aires",
+                                      "America/Argentina/Catamarca",
+                                      "America/Argentina/Cordoba",
+                                      "America/Argentina/Jujuy",
+                                      "America/Argentina/La_Rioja",
+                                      "America/Argentina/Mendoza",
+                                      "America/Argentina/Rio_Gallegos",
+                                      "America/Argentina/Salta",
+                                      "America/Argentina/San_Juan",
+                                      "America/Argentina/San_Luis",
+                                      "America/Argentina/Tucuman",
+                                      "America/Argentina/Ushuaia",
+                                      "America/Aruba",
+                                      "America/Asuncion",
+                                      "America/Atikokan",
+                                      "America/Atka",
+                                      "America/Bahia",
+                                      "America/Bahia_Banderas",
+                                      "America/Barbados",
+                                      "America/Belem",
+                                      "America/Belize",
+                                      "America/Blanc-Sablon",
+                                      "America/Boa_Vista",
+                                      "America/Bogota",
+                                      "America/Boise",
+                                      "America/Cambridge_Bay",
+                                      "America/Campo_Grande",
+                                      "America/Cancun",
+                                      "America/Caracas",
+                                      "America/Cayenne",
+                                      "America/Cayman",
+                                      "America/Chicago",
+                                      "America/Chihuahua",
+                                      "America/Ciudad_Juarez",
+                                      "America/Coral_Harbour",
+                                      "America/Costa_Rica",
+                                      "America/Coyhaique",
+                                      "America/Creston",
+                                      "America/Cuiaba",
+                                      "America/Curacao",
+                                      "America/Danmarkshavn",
+                                      "America/Dawson",
+                                      "America/Dawson_Creek",
+                                      "America/Denver",
+                                      "America/Detroit",
+                                      "America/Dominica",
+                                      "America/Edmonton",
+                                      "America/Eirunepe",
+                                      "America/El_Salvador",
+                                      "America/Ensenada",
+                                      "America/Fort_Nelson",
+                                      "America/Fortaleza",
+                                      "America/Glace_Bay",
+                                      "America/Goose_Bay",
+                                      "America/Grand_Turk",
+                                      "America/Grenada",
+                                      "America/Guadeloupe",
+                                      "America/Guatemala",
+                                      "America/Guayaquil",
+                                      "America/Guyana",
+                                      "America/Halifax",
+                                      "America/Havana",
+                                      "America/Hermosillo",
+                                      "America/Indiana/Indianapolis",
+                                      "America/Indiana/Knox",
+                                      "America/Indiana/Marengo",
+                                      "America/Indiana/Petersburg",
+                                      "America/Indiana/Tell_City",
+                                      "America/Indiana/Vevay",
+                                      "America/Indiana/Vincennes",
+                                      "America/Indiana/Winamac",
+                                      "America/Inuvik",
+                                      "America/Iqaluit",
+                                      "America/Jamaica",
+                                      "America/Juneau",
+                                      "America/Kentucky/Louisville",
+                                      "America/Kentucky/Monticello",
+                                      "America/Kralendijk",
+                                      "America/La_Paz",
+                                      "America/Lima",
+                                      "America/Los_Angeles",
+                                      "America/Lower_Princes",
+                                      "America/Maceio",
+                                      "America/Managua",
+                                      "America/Manaus",
+                                      "America/Marigot",
+                                      "America/Martinique",
+                                      "America/Matamoros",
+                                      "America/Mazatlan",
+                                      "America/Menominee",
+                                      "America/Merida",
+                                      "America/Metlakatla",
+                                      "America/Mexico_City",
+                                      "America/Miquelon",
+                                      "America/Moncton",
+                                      "America/Monterrey",
+                                      "America/Montevideo",
+                                      "America/Montreal",
+                                      "America/Montserrat",
+                                      "America/Nassau",
+                                      "America/New_York",
+                                      "America/Nipigon",
+                                      "America/Nome",
+                                      "America/Noronha",
+                                      "America/North_Dakota/Beulah",
+                                      "America/North_Dakota/Center",
+                                      "America/North_Dakota/New_Salem",
+                                      "America/Nuuk",
+                                      "America/Ojinaga",
+                                      "America/Panama",
+                                      "America/Pangnirtung",
+                                      "America/Paramaribo",
+                                      "America/Phoenix",
+                                      "America/Port-au-Prince",
+                                      "America/Port_of_Spain",
+                                      "America/Porto_Acre",
+                                      "America/Porto_Velho",
+                                      "America/Puerto_Rico",
+                                      "America/Punta_Arenas",
+                                      "America/Rainy_River",
+                                      "America/Rankin_Inlet",
+                                      "America/Recife",
+                                      "America/Regina",
+                                      "America/Resolute",
+                                      "America/Rio_Branco",
+                                      "America/Santa_Isabel",
+                                      "America/Santarem",
+                                      "America/Santiago",
+                                      "America/Santo_Domingo",
+                                      "America/Sao_Paulo",
+                                      "America/Scoresbysund",
+                                      "America/Shiprock",
+                                      "America/Sitka",
+                                      "America/St_Barthelemy",
+                                      "America/St_Johns",
+                                      "America/St_Kitts",
+                                      "America/St_Lucia",
+                                      "America/St_Thomas",
+                                      "America/St_Vincent",
+                                      "America/Swift_Current",
+                                      "America/Tegucigalpa",
+                                      "America/Thule",
+                                      "America/Thunder_Bay",
+                                      "America/Tijuana",
+                                      "America/Toronto",
+                                      "America/Tortola",
+                                      "America/Vancouver",
+                                      "America/Virgin",
+                                      "America/Whitehorse",
+                                      "America/Winnipeg",
+                                      "America/Yakutat",
+                                      "America/Yellowknife",
+                                      "Antarctica/Casey",
+                                      "Antarctica/Davis",
+                                      "Antarctica/DumontDUrville",
+                                      "Antarctica/Macquarie",
+                                      "Antarctica/Mawson",
+                                      "Antarctica/McMurdo",
+                                      "Antarctica/Palmer",
+                                      "Antarctica/Rothera",
+                                      "Antarctica/Syowa",
+                                      "Antarctica/Troll",
+                                      "Antarctica/Vostok",
+                                      "Arctic/Longyearbyen",
+                                      "Asia/Aden",
+                                      "Asia/Almaty",
+                                      "Asia/Amman",
+                                      "Asia/Anadyr",
+                                      "Asia/Aqtau",
+                                      "Asia/Aqtobe",
+                                      "Asia/Ashgabat",
+                                      "Asia/Atyrau",
+                                      "Asia/Baghdad",
+                                      "Asia/Bahrain",
+                                      "Asia/Baku",
+                                      "Asia/Bangkok",
+                                      "Asia/Barnaul",
+                                      "Asia/Beirut",
+                                      "Asia/Bishkek",
+                                      "Asia/Brunei",
+                                      "Asia/Chita",
+                                      "Asia/Choibalsan",
+                                      "Asia/Chongqing",
+                                      "Asia/Colombo",
+                                      "Asia/Damascus",
+                                      "Asia/Dhaka",
+                                      "Asia/Dili",
+                                      "Asia/Dubai",
+                                      "Asia/Dushanbe",
+                                      "Asia/Famagusta",
+                                      "Asia/Gaza",
+                                      "Asia/Harbin",
+                                      "Asia/Hebron",
+                                      "Asia/Ho_Chi_Minh",
+                                      "Asia/Hong_Kong",
+                                      "Asia/Hovd",
+                                      "Asia/Irkutsk",
+                                      "Asia/Istanbul",
+                                      "Asia/Jakarta",
+                                      "Asia/Jayapura",
+                                      "Asia/Jerusalem",
+                                      "Asia/Kabul",
+                                      "Asia/Kamchatka",
+                                      "Asia/Karachi",
+                                      "Asia/Kashgar",
+                                      "Asia/Kathmandu",
+                                      "Asia/Khandyga",
+                                      "Asia/Kolkata",
+                                      "Asia/Krasnoyarsk",
+                                      "Asia/Kuala_Lumpur",
+                                      "Asia/Kuching",
+                                      "Asia/Kuwait",
+                                      "Asia/Macau",
+                                      "Asia/Magadan",
+                                      "Asia/Makassar",
+                                      "Asia/Manila",
+                                      "Asia/Muscat",
+                                      "Asia/Nicosia",
+                                      "Asia/Novokuznetsk",
+                                      "Asia/Novosibirsk",
+                                      "Asia/Omsk",
+                                      "Asia/Oral",
+                                      "Asia/Phnom_Penh",
+                                      "Asia/Pontianak",
+                                      "Asia/Pyongyang",
+                                      "Asia/Qatar",
+                                      "Asia/Qostanay",
+                                      "Asia/Qyzylorda",
+                                      "Asia/Riyadh",
+                                      "Asia/Sakhalin",
+                                      "Asia/Samarkand",
+                                      "Asia/Seoul",
+                                      "Asia/Shanghai",
+                                      "Asia/Singapore",
+                                      "Asia/Srednekolymsk",
+                                      "Asia/Taipei",
+                                      "Asia/Tashkent",
+                                      "Asia/Tbilisi",
+                                      "Asia/Tehran",
+                                      "Asia/Tel_Aviv",
+                                      "Asia/Thimphu",
+                                      "Asia/Tokyo",
+                                      "Asia/Tomsk",
+                                      "Asia/Ulaanbaatar",
+                                      "Asia/Urumqi",
+                                      "Asia/Ust-Nera",
+                                      "Asia/Vientiane",
+                                      "Asia/Vladivostok",
+                                      "Asia/Yakutsk",
+                                      "Asia/Yangon",
+                                      "Asia/Yekaterinburg",
+                                      "Asia/Yerevan",
+                                      "Atlantic/Azores",
+                                      "Atlantic/Bermuda",
+                                      "Atlantic/Canary",
+                                      "Atlantic/Cape_Verde",
+                                      "Atlantic/Faroe",
+                                      "Atlantic/Jan_Mayen",
+                                      "Atlantic/Madeira",
+                                      "Atlantic/Reykjavik",
+                                      "Atlantic/South_Georgia",
+                                      "Atlantic/St_Helena",
+                                      "Atlantic/Stanley",
+                                      "Australia/Adelaide",
+                                      "Australia/Brisbane",
+                                      "Australia/Broken_Hill",
+                                      "Australia/Canberra",
+                                      "Australia/Currie",
+                                      "Australia/Darwin",
+                                      "Australia/Eucla",
+                                      "Australia/Hobart",
+                                      "Australia/Lindeman",
+                                      "Australia/Lord_Howe",
+                                      "Australia/Melbourne",
+                                      "Australia/Perth",
+                                      "Australia/Sydney",
+                                      "Australia/Yancowinna",
+                                      "Etc/GMT",
+                                      "Etc/GMT+0",
+                                      "Etc/GMT+1",
+                                      "Etc/GMT+10",
+                                      "Etc/GMT+11",
+                                      "Etc/GMT+12",
+                                      "Etc/GMT+2",
+                                      "Etc/GMT+3",
+                                      "Etc/GMT+4",
+                                      "Etc/GMT+5",
+                                      "Etc/GMT+6",
+                                      "Etc/GMT+7",
+                                      "Etc/GMT+8",
+                                      "Etc/GMT+9",
+                                      "Etc/GMT-0",
+                                      "Etc/GMT-1",
+                                      "Etc/GMT-10",
+                                      "Etc/GMT-11",
+                                      "Etc/GMT-12",
+                                      "Etc/GMT-13",
+                                      "Etc/GMT-14",
+                                      "Etc/GMT-2",
+                                      "Etc/GMT-3",
+                                      "Etc/GMT-4",
+                                      "Etc/GMT-5",
+                                      "Etc/GMT-6",
+                                      "Etc/GMT-7",
+                                      "Etc/GMT-8",
+                                      "Etc/GMT-9",
+                                      "Etc/GMT0",
+                                      "Etc/Greenwich",
+                                      "Etc/UCT",
+                                      "Etc/UTC",
+                                      "Etc/Universal",
+                                      "Etc/Zulu",
+                                      "Europe/Amsterdam",
+                                      "Europe/Andorra",
+                                      "Europe/Astrakhan",
+                                      "Europe/Athens",
+                                      "Europe/Belfast",
+                                      "Europe/Belgrade",
+                                      "Europe/Berlin",
+                                      "Europe/Bratislava",
+                                      "Europe/Brussels",
+                                      "Europe/Bucharest",
+                                      "Europe/Budapest",
+                                      "Europe/Busingen",
+                                      "Europe/Chisinau",
+                                      "Europe/Copenhagen",
+                                      "Europe/Dublin",
+                                      "Europe/Gibraltar",
+                                      "Europe/Guernsey",
+                                      "Europe/Helsinki",
+                                      "Europe/Isle_of_Man",
+                                      "Europe/Istanbul",
+                                      "Europe/Jersey",
+                                      "Europe/Kaliningrad",
+                                      "Europe/Kirov",
+                                      "Europe/Kyiv",
+                                      "Europe/Lisbon",
+                                      "Europe/Ljubljana",
+                                      "Europe/London",
+                                      "Europe/Luxembourg",
+                                      "Europe/Madrid",
+                                      "Europe/Malta",
+                                      "Europe/Mariehamn",
+                                      "Europe/Minsk",
+                                      "Europe/Monaco",
+                                      "Europe/Moscow",
+                                      "Europe/Nicosia",
+                                      "Europe/Oslo",
+                                      "Europe/Paris",
+                                      "Europe/Podgorica",
+                                      "Europe/Prague",
+                                      "Europe/Riga",
+                                      "Europe/Rome",
+                                      "Europe/Samara",
+                                      "Europe/San_Marino",
+                                      "Europe/Sarajevo",
+                                      "Europe/Saratov",
+                                      "Europe/Simferopol",
+                                      "Europe/Skopje",
+                                      "Europe/Sofia",
+                                      "Europe/Stockholm",
+                                      "Europe/Tallinn",
+                                      "Europe/Tirane",
+                                      "Europe/Tiraspol",
+                                      "Europe/Ulyanovsk",
+                                      "Europe/Vaduz",
+                                      "Europe/Vatican",
+                                      "Europe/Vienna",
+                                      "Europe/Vilnius",
+                                      "Europe/Volgograd",
+                                      "Europe/Warsaw",
+                                      "Europe/Zagreb",
+                                      "Europe/Zurich",
+                                      "Factory",
+                                      "Indian/Antananarivo",
+                                      "Indian/Chagos",
+                                      "Indian/Christmas",
+                                      "Indian/Cocos",
+                                      "Indian/Comoro",
+                                      "Indian/Kerguelen",
+                                      "Indian/Mahe",
+                                      "Indian/Maldives",
+                                      "Indian/Mauritius",
+                                      "Indian/Mayotte",
+                                      "Indian/Reunion",
+                                      "Pacific/Apia",
+                                      "Pacific/Auckland",
+                                      "Pacific/Bougainville",
+                                      "Pacific/Chatham",
+                                      "Pacific/Chuuk",
+                                      "Pacific/Easter",
+                                      "Pacific/Efate",
+                                      "Pacific/Fakaofo",
+                                      "Pacific/Fiji",
+                                      "Pacific/Funafuti",
+                                      "Pacific/Galapagos",
+                                      "Pacific/Gambier",
+                                      "Pacific/Guadalcanal",
+                                      "Pacific/Guam",
+                                      "Pacific/Honolulu",
+                                      "Pacific/Johnston",
+                                      "Pacific/Kanton",
+                                      "Pacific/Kiritimati",
+                                      "Pacific/Kosrae",
+                                      "Pacific/Kwajalein",
+                                      "Pacific/Majuro",
+                                      "Pacific/Marquesas",
+                                      "Pacific/Midway",
+                                      "Pacific/Nauru",
+                                      "Pacific/Niue",
+                                      "Pacific/Norfolk",
+                                      "Pacific/Noumea",
+                                      "Pacific/Pago_Pago",
+                                      "Pacific/Palau",
+                                      "Pacific/Pitcairn",
+                                      "Pacific/Pohnpei",
+                                      "Pacific/Port_Moresby",
+                                      "Pacific/Rarotonga",
+                                      "Pacific/Saipan",
+                                      "Pacific/Samoa",
+                                      "Pacific/Tahiti",
+                                      "Pacific/Tarawa",
+                                      "Pacific/Tongatapu",
+                                      "Pacific/Wake",
+                                      "Pacific/Wallis",
+                                      "Pacific/Yap",
+                                      "UTC",
+                                      nullptr};
+
+}  // namespace cctz
+}  // namespace time_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
diff --git a/absl/time/internal/cctz/src/test_time_zone_names.h b/absl/time/internal/cctz/src/test_time_zone_names.h
new file mode 100644
index 0000000..1993994
--- /dev/null
+++ b/absl/time/internal/cctz/src/test_time_zone_names.h
@@ -0,0 +1,33 @@
+// Copyright 2025 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+//   Unless required by applicable law or agreed to in writing, software
+//   distributed under the License is distributed on an "AS IS" BASIS,
+//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//   See the License for the specific language governing permissions and
+//   limitations under the License.
+
+#ifndef ABSL_TIME_INTERNAL_CCTZ_TEST_TIME_ZONE_NAMES_H_
+#define ABSL_TIME_INTERNAL_CCTZ_TEST_TIME_ZONE_NAMES_H_
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace time_internal {
+namespace cctz {
+
+// A list of known time-zone names.
+extern const char* const kTimeZoneNames[];
+
+}  // namespace cctz
+}  // namespace time_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_TIME_INTERNAL_CCTZ_TEST_TIME_ZONE_NAMES_H_
diff --git a/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
index e1bea28..cd08a35 100644
--- a/absl/time/internal/cctz/src/time_zone_lookup_test.cc
+++ b/absl/time/internal/cctz/src/time_zone_lookup_test.cc
@@ -29,6 +29,7 @@
 
 #include "gtest/gtest.h"
 #include "absl/time/internal/cctz/include/cctz/civil_time.h"
+#include "absl/time/internal/cctz/src/test_time_zone_names.h"
 
 namespace chrono = std::chrono;
 
@@ -39,494 +40,6 @@
 
 namespace {
 
-// A list of known time-zone names.
-const char* const kTimeZoneNames[] = {"Africa/Abidjan",
-                                      "Africa/Accra",
-                                      "Africa/Addis_Ababa",
-                                      "Africa/Algiers",
-                                      "Africa/Asmara",
-                                      "Africa/Bamako",
-                                      "Africa/Bangui",
-                                      "Africa/Banjul",
-                                      "Africa/Bissau",
-                                      "Africa/Blantyre",
-                                      "Africa/Brazzaville",
-                                      "Africa/Bujumbura",
-                                      "Africa/Cairo",
-                                      "Africa/Casablanca",
-                                      "Africa/Ceuta",
-                                      "Africa/Conakry",
-                                      "Africa/Dakar",
-                                      "Africa/Dar_es_Salaam",
-                                      "Africa/Djibouti",
-                                      "Africa/Douala",
-                                      "Africa/El_Aaiun",
-                                      "Africa/Freetown",
-                                      "Africa/Gaborone",
-                                      "Africa/Harare",
-                                      "Africa/Johannesburg",
-                                      "Africa/Juba",
-                                      "Africa/Kampala",
-                                      "Africa/Khartoum",
-                                      "Africa/Kigali",
-                                      "Africa/Kinshasa",
-                                      "Africa/Lagos",
-                                      "Africa/Libreville",
-                                      "Africa/Lome",
-                                      "Africa/Luanda",
-                                      "Africa/Lubumbashi",
-                                      "Africa/Lusaka",
-                                      "Africa/Malabo",
-                                      "Africa/Maputo",
-                                      "Africa/Maseru",
-                                      "Africa/Mbabane",
-                                      "Africa/Mogadishu",
-                                      "Africa/Monrovia",
-                                      "Africa/Nairobi",
-                                      "Africa/Ndjamena",
-                                      "Africa/Niamey",
-                                      "Africa/Nouakchott",
-                                      "Africa/Ouagadougou",
-                                      "Africa/Porto-Novo",
-                                      "Africa/Sao_Tome",
-                                      "Africa/Timbuktu",
-                                      "Africa/Tripoli",
-                                      "Africa/Tunis",
-                                      "Africa/Windhoek",
-                                      "America/Adak",
-                                      "America/Anchorage",
-                                      "America/Anguilla",
-                                      "America/Antigua",
-                                      "America/Araguaina",
-                                      "America/Argentina/Buenos_Aires",
-                                      "America/Argentina/Catamarca",
-                                      "America/Argentina/Cordoba",
-                                      "America/Argentina/Jujuy",
-                                      "America/Argentina/La_Rioja",
-                                      "America/Argentina/Mendoza",
-                                      "America/Argentina/Rio_Gallegos",
-                                      "America/Argentina/Salta",
-                                      "America/Argentina/San_Juan",
-                                      "America/Argentina/San_Luis",
-                                      "America/Argentina/Tucuman",
-                                      "America/Argentina/Ushuaia",
-                                      "America/Aruba",
-                                      "America/Asuncion",
-                                      "America/Atikokan",
-                                      "America/Atka",
-                                      "America/Bahia",
-                                      "America/Bahia_Banderas",
-                                      "America/Barbados",
-                                      "America/Belem",
-                                      "America/Belize",
-                                      "America/Blanc-Sablon",
-                                      "America/Boa_Vista",
-                                      "America/Bogota",
-                                      "America/Boise",
-                                      "America/Cambridge_Bay",
-                                      "America/Campo_Grande",
-                                      "America/Cancun",
-                                      "America/Caracas",
-                                      "America/Cayenne",
-                                      "America/Cayman",
-                                      "America/Chicago",
-                                      "America/Chihuahua",
-                                      "America/Ciudad_Juarez",
-                                      "America/Coral_Harbour",
-                                      "America/Costa_Rica",
-                                      "America/Coyhaique",
-                                      "America/Creston",
-                                      "America/Cuiaba",
-                                      "America/Curacao",
-                                      "America/Danmarkshavn",
-                                      "America/Dawson",
-                                      "America/Dawson_Creek",
-                                      "America/Denver",
-                                      "America/Detroit",
-                                      "America/Dominica",
-                                      "America/Edmonton",
-                                      "America/Eirunepe",
-                                      "America/El_Salvador",
-                                      "America/Ensenada",
-                                      "America/Fort_Nelson",
-                                      "America/Fortaleza",
-                                      "America/Glace_Bay",
-                                      "America/Goose_Bay",
-                                      "America/Grand_Turk",
-                                      "America/Grenada",
-                                      "America/Guadeloupe",
-                                      "America/Guatemala",
-                                      "America/Guayaquil",
-                                      "America/Guyana",
-                                      "America/Halifax",
-                                      "America/Havana",
-                                      "America/Hermosillo",
-                                      "America/Indiana/Indianapolis",
-                                      "America/Indiana/Knox",
-                                      "America/Indiana/Marengo",
-                                      "America/Indiana/Petersburg",
-                                      "America/Indiana/Tell_City",
-                                      "America/Indiana/Vevay",
-                                      "America/Indiana/Vincennes",
-                                      "America/Indiana/Winamac",
-                                      "America/Inuvik",
-                                      "America/Iqaluit",
-                                      "America/Jamaica",
-                                      "America/Juneau",
-                                      "America/Kentucky/Louisville",
-                                      "America/Kentucky/Monticello",
-                                      "America/Kralendijk",
-                                      "America/La_Paz",
-                                      "America/Lima",
-                                      "America/Los_Angeles",
-                                      "America/Lower_Princes",
-                                      "America/Maceio",
-                                      "America/Managua",
-                                      "America/Manaus",
-                                      "America/Marigot",
-                                      "America/Martinique",
-                                      "America/Matamoros",
-                                      "America/Mazatlan",
-                                      "America/Menominee",
-                                      "America/Merida",
-                                      "America/Metlakatla",
-                                      "America/Mexico_City",
-                                      "America/Miquelon",
-                                      "America/Moncton",
-                                      "America/Monterrey",
-                                      "America/Montevideo",
-                                      "America/Montreal",
-                                      "America/Montserrat",
-                                      "America/Nassau",
-                                      "America/New_York",
-                                      "America/Nipigon",
-                                      "America/Nome",
-                                      "America/Noronha",
-                                      "America/North_Dakota/Beulah",
-                                      "America/North_Dakota/Center",
-                                      "America/North_Dakota/New_Salem",
-                                      "America/Nuuk",
-                                      "America/Ojinaga",
-                                      "America/Panama",
-                                      "America/Pangnirtung",
-                                      "America/Paramaribo",
-                                      "America/Phoenix",
-                                      "America/Port-au-Prince",
-                                      "America/Port_of_Spain",
-                                      "America/Porto_Acre",
-                                      "America/Porto_Velho",
-                                      "America/Puerto_Rico",
-                                      "America/Punta_Arenas",
-                                      "America/Rainy_River",
-                                      "America/Rankin_Inlet",
-                                      "America/Recife",
-                                      "America/Regina",
-                                      "America/Resolute",
-                                      "America/Rio_Branco",
-                                      "America/Santa_Isabel",
-                                      "America/Santarem",
-                                      "America/Santiago",
-                                      "America/Santo_Domingo",
-                                      "America/Sao_Paulo",
-                                      "America/Scoresbysund",
-                                      "America/Shiprock",
-                                      "America/Sitka",
-                                      "America/St_Barthelemy",
-                                      "America/St_Johns",
-                                      "America/St_Kitts",
-                                      "America/St_Lucia",
-                                      "America/St_Thomas",
-                                      "America/St_Vincent",
-                                      "America/Swift_Current",
-                                      "America/Tegucigalpa",
-                                      "America/Thule",
-                                      "America/Thunder_Bay",
-                                      "America/Tijuana",
-                                      "America/Toronto",
-                                      "America/Tortola",
-                                      "America/Vancouver",
-                                      "America/Virgin",
-                                      "America/Whitehorse",
-                                      "America/Winnipeg",
-                                      "America/Yakutat",
-                                      "America/Yellowknife",
-                                      "Antarctica/Casey",
-                                      "Antarctica/Davis",
-                                      "Antarctica/DumontDUrville",
-                                      "Antarctica/Macquarie",
-                                      "Antarctica/Mawson",
-                                      "Antarctica/McMurdo",
-                                      "Antarctica/Palmer",
-                                      "Antarctica/Rothera",
-                                      "Antarctica/Syowa",
-                                      "Antarctica/Troll",
-                                      "Antarctica/Vostok",
-                                      "Arctic/Longyearbyen",
-                                      "Asia/Aden",
-                                      "Asia/Almaty",
-                                      "Asia/Amman",
-                                      "Asia/Anadyr",
-                                      "Asia/Aqtau",
-                                      "Asia/Aqtobe",
-                                      "Asia/Ashgabat",
-                                      "Asia/Atyrau",
-                                      "Asia/Baghdad",
-                                      "Asia/Bahrain",
-                                      "Asia/Baku",
-                                      "Asia/Bangkok",
-                                      "Asia/Barnaul",
-                                      "Asia/Beirut",
-                                      "Asia/Bishkek",
-                                      "Asia/Brunei",
-                                      "Asia/Chita",
-                                      "Asia/Choibalsan",
-                                      "Asia/Chongqing",
-                                      "Asia/Colombo",
-                                      "Asia/Damascus",
-                                      "Asia/Dhaka",
-                                      "Asia/Dili",
-                                      "Asia/Dubai",
-                                      "Asia/Dushanbe",
-                                      "Asia/Famagusta",
-                                      "Asia/Gaza",
-                                      "Asia/Harbin",
-                                      "Asia/Hebron",
-                                      "Asia/Ho_Chi_Minh",
-                                      "Asia/Hong_Kong",
-                                      "Asia/Hovd",
-                                      "Asia/Irkutsk",
-                                      "Asia/Istanbul",
-                                      "Asia/Jakarta",
-                                      "Asia/Jayapura",
-                                      "Asia/Jerusalem",
-                                      "Asia/Kabul",
-                                      "Asia/Kamchatka",
-                                      "Asia/Karachi",
-                                      "Asia/Kashgar",
-                                      "Asia/Kathmandu",
-                                      "Asia/Khandyga",
-                                      "Asia/Kolkata",
-                                      "Asia/Krasnoyarsk",
-                                      "Asia/Kuala_Lumpur",
-                                      "Asia/Kuching",
-                                      "Asia/Kuwait",
-                                      "Asia/Macau",
-                                      "Asia/Magadan",
-                                      "Asia/Makassar",
-                                      "Asia/Manila",
-                                      "Asia/Muscat",
-                                      "Asia/Nicosia",
-                                      "Asia/Novokuznetsk",
-                                      "Asia/Novosibirsk",
-                                      "Asia/Omsk",
-                                      "Asia/Oral",
-                                      "Asia/Phnom_Penh",
-                                      "Asia/Pontianak",
-                                      "Asia/Pyongyang",
-                                      "Asia/Qatar",
-                                      "Asia/Qostanay",
-                                      "Asia/Qyzylorda",
-                                      "Asia/Riyadh",
-                                      "Asia/Sakhalin",
-                                      "Asia/Samarkand",
-                                      "Asia/Seoul",
-                                      "Asia/Shanghai",
-                                      "Asia/Singapore",
-                                      "Asia/Srednekolymsk",
-                                      "Asia/Taipei",
-                                      "Asia/Tashkent",
-                                      "Asia/Tbilisi",
-                                      "Asia/Tehran",
-                                      "Asia/Tel_Aviv",
-                                      "Asia/Thimphu",
-                                      "Asia/Tokyo",
-                                      "Asia/Tomsk",
-                                      "Asia/Ulaanbaatar",
-                                      "Asia/Urumqi",
-                                      "Asia/Ust-Nera",
-                                      "Asia/Vientiane",
-                                      "Asia/Vladivostok",
-                                      "Asia/Yakutsk",
-                                      "Asia/Yangon",
-                                      "Asia/Yekaterinburg",
-                                      "Asia/Yerevan",
-                                      "Atlantic/Azores",
-                                      "Atlantic/Bermuda",
-                                      "Atlantic/Canary",
-                                      "Atlantic/Cape_Verde",
-                                      "Atlantic/Faroe",
-                                      "Atlantic/Jan_Mayen",
-                                      "Atlantic/Madeira",
-                                      "Atlantic/Reykjavik",
-                                      "Atlantic/South_Georgia",
-                                      "Atlantic/St_Helena",
-                                      "Atlantic/Stanley",
-                                      "Australia/Adelaide",
-                                      "Australia/Brisbane",
-                                      "Australia/Broken_Hill",
-                                      "Australia/Canberra",
-                                      "Australia/Currie",
-                                      "Australia/Darwin",
-                                      "Australia/Eucla",
-                                      "Australia/Hobart",
-                                      "Australia/Lindeman",
-                                      "Australia/Lord_Howe",
-                                      "Australia/Melbourne",
-                                      "Australia/Perth",
-                                      "Australia/Sydney",
-                                      "Australia/Yancowinna",
-                                      "Etc/GMT",
-                                      "Etc/GMT+0",
-                                      "Etc/GMT+1",
-                                      "Etc/GMT+10",
-                                      "Etc/GMT+11",
-                                      "Etc/GMT+12",
-                                      "Etc/GMT+2",
-                                      "Etc/GMT+3",
-                                      "Etc/GMT+4",
-                                      "Etc/GMT+5",
-                                      "Etc/GMT+6",
-                                      "Etc/GMT+7",
-                                      "Etc/GMT+8",
-                                      "Etc/GMT+9",
-                                      "Etc/GMT-0",
-                                      "Etc/GMT-1",
-                                      "Etc/GMT-10",
-                                      "Etc/GMT-11",
-                                      "Etc/GMT-12",
-                                      "Etc/GMT-13",
-                                      "Etc/GMT-14",
-                                      "Etc/GMT-2",
-                                      "Etc/GMT-3",
-                                      "Etc/GMT-4",
-                                      "Etc/GMT-5",
-                                      "Etc/GMT-6",
-                                      "Etc/GMT-7",
-                                      "Etc/GMT-8",
-                                      "Etc/GMT-9",
-                                      "Etc/GMT0",
-                                      "Etc/Greenwich",
-                                      "Etc/UCT",
-                                      "Etc/UTC",
-                                      "Etc/Universal",
-                                      "Etc/Zulu",
-                                      "Europe/Amsterdam",
-                                      "Europe/Andorra",
-                                      "Europe/Astrakhan",
-                                      "Europe/Athens",
-                                      "Europe/Belfast",
-                                      "Europe/Belgrade",
-                                      "Europe/Berlin",
-                                      "Europe/Bratislava",
-                                      "Europe/Brussels",
-                                      "Europe/Bucharest",
-                                      "Europe/Budapest",
-                                      "Europe/Busingen",
-                                      "Europe/Chisinau",
-                                      "Europe/Copenhagen",
-                                      "Europe/Dublin",
-                                      "Europe/Gibraltar",
-                                      "Europe/Guernsey",
-                                      "Europe/Helsinki",
-                                      "Europe/Isle_of_Man",
-                                      "Europe/Istanbul",
-                                      "Europe/Jersey",
-                                      "Europe/Kaliningrad",
-                                      "Europe/Kirov",
-                                      "Europe/Kyiv",
-                                      "Europe/Lisbon",
-                                      "Europe/Ljubljana",
-                                      "Europe/London",
-                                      "Europe/Luxembourg",
-                                      "Europe/Madrid",
-                                      "Europe/Malta",
-                                      "Europe/Mariehamn",
-                                      "Europe/Minsk",
-                                      "Europe/Monaco",
-                                      "Europe/Moscow",
-                                      "Europe/Nicosia",
-                                      "Europe/Oslo",
-                                      "Europe/Paris",
-                                      "Europe/Podgorica",
-                                      "Europe/Prague",
-                                      "Europe/Riga",
-                                      "Europe/Rome",
-                                      "Europe/Samara",
-                                      "Europe/San_Marino",
-                                      "Europe/Sarajevo",
-                                      "Europe/Saratov",
-                                      "Europe/Simferopol",
-                                      "Europe/Skopje",
-                                      "Europe/Sofia",
-                                      "Europe/Stockholm",
-                                      "Europe/Tallinn",
-                                      "Europe/Tirane",
-                                      "Europe/Tiraspol",
-                                      "Europe/Ulyanovsk",
-                                      "Europe/Vaduz",
-                                      "Europe/Vatican",
-                                      "Europe/Vienna",
-                                      "Europe/Vilnius",
-                                      "Europe/Volgograd",
-                                      "Europe/Warsaw",
-                                      "Europe/Zagreb",
-                                      "Europe/Zurich",
-                                      "Factory",
-                                      "Indian/Antananarivo",
-                                      "Indian/Chagos",
-                                      "Indian/Christmas",
-                                      "Indian/Cocos",
-                                      "Indian/Comoro",
-                                      "Indian/Kerguelen",
-                                      "Indian/Mahe",
-                                      "Indian/Maldives",
-                                      "Indian/Mauritius",
-                                      "Indian/Mayotte",
-                                      "Indian/Reunion",
-                                      "Pacific/Apia",
-                                      "Pacific/Auckland",
-                                      "Pacific/Bougainville",
-                                      "Pacific/Chatham",
-                                      "Pacific/Chuuk",
-                                      "Pacific/Easter",
-                                      "Pacific/Efate",
-                                      "Pacific/Fakaofo",
-                                      "Pacific/Fiji",
-                                      "Pacific/Funafuti",
-                                      "Pacific/Galapagos",
-                                      "Pacific/Gambier",
-                                      "Pacific/Guadalcanal",
-                                      "Pacific/Guam",
-                                      "Pacific/Honolulu",
-                                      "Pacific/Johnston",
-                                      "Pacific/Kanton",
-                                      "Pacific/Kiritimati",
-                                      "Pacific/Kosrae",
-                                      "Pacific/Kwajalein",
-                                      "Pacific/Majuro",
-                                      "Pacific/Marquesas",
-                                      "Pacific/Midway",
-                                      "Pacific/Nauru",
-                                      "Pacific/Niue",
-                                      "Pacific/Norfolk",
-                                      "Pacific/Noumea",
-                                      "Pacific/Pago_Pago",
-                                      "Pacific/Palau",
-                                      "Pacific/Pitcairn",
-                                      "Pacific/Pohnpei",
-                                      "Pacific/Port_Moresby",
-                                      "Pacific/Rarotonga",
-                                      "Pacific/Saipan",
-                                      "Pacific/Samoa",
-                                      "Pacific/Tahiti",
-                                      "Pacific/Tarawa",
-                                      "Pacific/Tongatapu",
-                                      "Pacific/Wake",
-                                      "Pacific/Wallis",
-                                      "Pacific/Yap",
-                                      "UTC",
-                                      nullptr};
-
 // Helper to return a loaded time zone by value (UTC on error).
 time_zone LoadZone(const std::string& name) {
   time_zone tz;