Asian time zones:

IRKST – Irkutsk Summer Time



  • IRKST is not observed in any location this year.

    Locations that used to be on IRKST for part or all of the year are now on IRKT (Irkutsk Time) instead.
Currently no cities are observing IRKST

Find local time and time zone for a location

We recommend looking up by location name, not time zone name.

Time zone offset: UTC + 9 hours

IRKST is 9 hours ahead of Coordinated Universal Time (UTC)

Time zone abbreviation: IRKST

Full name is Irkutsk Summer Time

Email time zone indicator: +0900

An email sent from someone in the IRKST time zone will have the time zone listed as "+0900" in the headers of the email. (However, "+0900" does not have to be in IRKST, as other time zones could have the same UTC offset).

For actual dates DST might be observed, look at the examples below

Where and when is IRKST observed?

Areas using IRKST in the summer and IRKT during the winter

Time zone maps are under development and will be available later

Example location in IRKST

Other time zones in Asia

Go directly through the links below, or see the Asia time zone list

Time zones in other regions

Related links