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IRKST – Irkutsk Summer Time (Daylight Saving Time)

Irkutsk Summer Time Note:

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.

Time zone map of IRKST
No locations currently on IRKST.
Areas with same time currently (UTC +9:00).
No locations are currently on IRKST – Irkutsk Summer Time.
Currently has same time zone offset as IRKST (UTC +9:00) but different time zone name.

Irkutsk Summer Time (IRKST) is 9 hours ahead of Coordinated Universal Time (UTC). This time zone is a DST (daylight saving time) time zone and is used in: Asia.

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: 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:

No locations currently on IRKST

  • UTC Offset: UTC +9:00

Find current time and time zone by city


Related time zones

IRKT – Irkutsk Time (Standard Time)

Time Zone Map with DST

Time zone map

Time Zone Map