icu4c/source/data/zone/om.txt

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
// Generated using tools/cldr/cldr-to-icu/build-icu-data.xml
om{
    zoneStrings{
        gmtFormat{"GMT{0}"}
        hourFormat{"+HH:mm;-HH:mm"}
    }
}