Reference hub
Time Zone Abbreviations
Compare fixed time zone abbreviations such as EST, CET, UTC, GMT, PST, and IST.
Date Time Encyclopedia answer, with calculation details and assumptions below.
Choose one of the focused calculators below. Each page gives a direct answer first, then shows the assumptions and related date or time lookups.
Snapshot
Time Zone Abbreviations
Compare fixed time zone abbreviations such as EST, CET, UTC, GMT, PST, and IST.
Choose one of the focused calculators below. Each page gives a direct answer first, then shows the assumptions and related date or time lookups.
- Abbreviation basis
- Fixed offsets or declared reference zones
- DST warning
- Use city pages for daylight-aware local time
- Abbreviations covered
- 18
- Best use
- Fixed abbreviation comparisons
Method
Hub pages group focused answer pages around a shared date, calendar, time zone, or timestamp intent.
Find Another Lookup
Abbreviation caveat
Some abbreviations can refer to more than one region or to standard versus daylight time. Each abbreviation page states the basis used before giving the time difference.
Use city pages for local clocks
If a meeting depends on actual local time in a city, use the city converter so daylight saving rules are tied to the location.
Related Lookups
FAQ
What is the time zone abbreviations for?
Compare fixed time zone abbreviations such as EST, CET, UTC, GMT, PST, and IST.
Where should I start?
Open one of the focused lookups listed here. Each lookup provides a direct answer and the assumptions behind it.