European time zones:

IST – Irish Summer Time

Time zone offset: UTC + 1 hour

Note that IST is a daylight saving time/summer time zone. It is generally only used during the summer in the places listed below, during the winter GMT is used instead

Time zone abbreviation: IST

Email time zone indicator: +0100

An email sent from someone in the 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 IST, as other time zones could have the same UTC offset).

Important Note

The term “IST” is not the legal abbreviation to describe Irish Summer Time but it is commonly used. IST is described as “summer time”, according to Irish law, while Irish Standard Time is described as both “standard time” and “winter time”.

Where and when is IST observed?

IST is used during summer only in

• Ireland

Example location in IST

• Dublin - during summer

Other time zones in Europe

• GMT - Greenwich Mean Time
• BST - British Summer Time
• WET - Western European Time
• WEST - Western European Summer Time
• CET - Central European Time
• CEST - Central European Summer Time
• EET - Eastern European Time
• EEST - Eastern European Summer Time
• MSK - Moscow Standard Time
• MSD - Moscow Daylight Time

Time zones in other regions

• North America
• Australia
• Military

Related links

• Time zone abbreviations world-wide
• The World Clock - Time Zones - current time around the world
• The World Clock - Time Zone Converter - Convert between time zones
• World Clock - Europe - current time in Europe