icu4c/source/data/zone/en_IE.txt

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
en_IE{
    %%Parent{"en_001"}
    Version{"2.1.29.54"}
    zoneStrings{
        "Europe:Dublin"{
            sd{"IST"}
        }
    }
}