IST – Irish Summer Time
Time zone offset: UTC + 1 hour
IST is 1 hour ahead of Coordinated Universal Time (UTC)
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
Full name is Irish Summer Time
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
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