Yakutsk time zone history
The latest change of standard time came on October 26, 2014, from UTC+10 to UTC+9. The Yakutsk zone has changed its standard time 4 times since 1970, the third-most of the 9 zones on UTC+9 standard time. Daylight saving time was used in 30 years since 1970, last in 2010; under the current rules the clocks no longer change.
UTC+9
Standard time is UTC+9 all year under the current rules.
Summer time in 30 of 57 years since 1970
Before 1970
Standard time changes
| Date | Change | New standard time | Clock label |
|---|---|---|---|
| Before 1970 | |||
| December 15, 1919 | Local mean time (UTC+8:38:58) replaced | UTC+8 | numeric only |
| June 21, 1930 | Standard time forward 1 hour | UTC+9 | numeric only |
| Since 1970 | |||
| March 31, 1991 | Summer offset kept as standard time; clocks did not move | UTC+8 | numeric only |
| January 19, 1992 | Standard time forward 1 hour | UTC+9 | numeric only |
| March 27, 2011 | Standard time forward 1 hour | UTC+10 | numeric only |
| October 26, 2014 | Standard time back 1 hour | UTC+9 | numeric only |
Daylight saving periods
Since 1970: the periods shared by 14 of 26 zones, listed on the Russia page.
Also on UTC+9
Khandyga (Russia), Chita (Russia), North Korea, South Korea, Japan, Palau, Jayapura (Indonesia) and East Timor.
Clocks next door since 1970
- Khandyga (313 km): same time except 2,812 days in 2003–2011.
- Ust-Nera (733 km): usually 2 hours ahead; different on 9,702 days in 1970–2026; 1 hour ahead today.
- Magadan (1,173 km): usually 2 hours ahead; different on 551 days in 1981–2011 and 2014–2016.
- Srednekolymsk (1,282 km): usually 2 hours ahead; different on 5 days in 1981–2011 and 2014.
- Chita (1,470 km): same time except 518 days in 2014–2016.
How it compares
On standard time, clocks in Yakutsk run 21 minutes ahead of local mean solar time.