Time Zone Abbreviation Lookup
Look up what common time zone abbreviations like EST, PST, GMT, or IST actually stand for and their offset from UTC.
Time zone abbreviations like EST, PST, GMT, and IST get used constantly in casual conversation and scheduling, but they're a surprisingly imprecise shorthand — the same three letters can mean different things depending on context, and abbreviations for zones that observe daylight saving time actually change partway through the year, so "EST" technically only applies for part of it while "EDT" covers the rest, even though most people say "Eastern time" year-round without distinguishing the two.
That ambiguity is exactly why relying on abbreviations alone can cause real scheduling mistakes, especially across countries — "IST" is used for both India Standard Time and Israel Standard Time, two zones with a significant offset between them, and mixing them up in an international conversation is an easy, genuinely common error.
This tool works as a quick reference rather than a converter: search or scroll through common abbreviations to see what each one actually stands for and its UTC offset, which is useful both for double-checking an abbreviation someone else used and for confirming you're using the right one yourself before scheduling something across time zones.
- Type an abbreviation to filter, or scroll the full list.
- Read the full name and UTC offset.
Zones that observe Daylight Saving Time (like US zones) have two abbreviations — the Standard one for winter and the Daylight one for summer.
It covers the most commonly searched abbreviations. For a full IANA time zone database lookup, use the Time Zone Converter tool instead.