Home > Time Zones > Abbreviations > IST – Irish Standard Time

IST – Irish Standard Time (Daylight Saving Time)

Also known as: IST – Irish Summer Time

IST is currently not used at all

Europe: IST is currently not observed because locations are on standard time and are observing GMT.

Time zone map of IST
No locations currently on IST.
Observes IST part of the year.
Areas with same time currently (UTC +1:00).
No locations are currently on IST – Irish Standard Time.
Observes IST – Irish Standard Time part of the year, but not currently.
Currently has same time zone offset as IST (UTC +1:00) but different time zone name.

Irish Standard Time (IST) is 1 hour ahead of Coordinated Universal Time (UTC). This time zone is a DST (daylight saving time) time zone and is used in: Europe.

See full time zone map

Winter Time & DST

This time zone is a daylight saving/summer time zone, in the winter some places will switch to the corresponding standard time zone: GMT (Greenwich Mean Time).

Email time zone indicator: +0100

An email sent from someone in the Irish Standard Time (IST) time zone will have the time zone listed as "+0100" in the headers of the email. (However, "+0100" does not have to be in Irish Standard Time, as other time zones could have the same UTC offset).

Where and when is IST observed?


European countries using IST in the summer and GMT in the winter

  • Ireland

Other time zones in UTC +1:00

Some time zones exist that have the same offset as IST, but can be found under a different name:

No locations currently on IST

Find current time and time zone by city


Other time zones named IST

IST – Israel Standard Time
IST – India Standard Time

Example cities

Ireland – Dublin (Summer)

Related time zones

GMT – Greenwich Mean Time (Standard Time)

Time Zone Map with DST

Time zone map

Time Zone Map