IRKST – Irkutsk Summer Time (Daylight Saving Time)
IRKST is not used at all this year
Asia: 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 instead.
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: IRKT (Irkutsk Time).
Email time zone indicator: +0900
An email sent from someone in the Irkutsk Summer Time (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 Irkutsk Summer Time, as other time zones could have the same UTC offset).
Where and when is IRKST observed?This time zone is no longer in use, but some locations may observe the same UTC offset (local time) under a different name.
Other time zones in UTC +9:00
Some time zones exist that have the same offset as IRKST, but can be found under a different name:
Time zones by continent/region
- Central America
- Indian Ocean
- North America
- Other time standards
- South America
No locations currently on IRKST
Find current time and time zone by city
Related time zones
IRKT – Irkutsk Time (Standard Time)