Asia/Yakutsk

Time zone identifier: Asia/Yakutsk

Current civil offset: +09:00 (+09)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1919-12-14

Local Mean Time (LMT): +08:38:58 based on geographic meridian

Total recorded transitions: 65 transitions across 4 distinct offsets

Associated countries: RU

Historical Offset Step Chart (1880 to Present)

Text summary: Asia/Yakutsk shifted between 4 distinct offsets from 1919-12-14 through the modern era.

Complete Transition History (65 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1919-12-14T15:21:02Z`	`1919-12-14 23:21:02`	+08:38:58 → +08:00	`+08`	No	overlap
`1930-06-20T16:00:00Z`	`1930-06-21 01:00:00`	+08:00 → +09:00	`+09`	No	gap
`1981-03-31T15:00:00Z`	`1981-04-01 01:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1981-09-30T14:00:00Z`	`1981-09-30 23:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1982-03-31T15:00:00Z`	`1982-04-01 01:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1982-09-30T14:00:00Z`	`1982-09-30 23:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1983-03-31T15:00:00Z`	`1983-04-01 01:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1983-09-30T14:00:00Z`	`1983-09-30 23:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1984-03-31T15:00:00Z`	`1984-04-01 01:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1984-09-29T17:00:00Z`	`1984-09-30 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1985-03-30T17:00:00Z`	`1985-03-31 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1985-09-28T17:00:00Z`	`1985-09-29 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1986-03-29T17:00:00Z`	`1986-03-30 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1986-09-27T17:00:00Z`	`1986-09-28 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1987-03-28T17:00:00Z`	`1987-03-29 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1987-09-26T17:00:00Z`	`1987-09-27 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1988-03-26T17:00:00Z`	`1988-03-27 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1988-09-24T17:00:00Z`	`1988-09-25 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1989-03-25T17:00:00Z`	`1989-03-26 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1989-09-23T17:00:00Z`	`1989-09-24 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1990-03-24T17:00:00Z`	`1990-03-25 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1990-09-29T17:00:00Z`	`1990-09-30 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1991-03-30T17:00:00Z`	`1991-03-31 02:00:00`	+09:00 → +09:00	`+09`	Yes	offset-only
`1991-09-28T18:00:00Z`	`1991-09-29 02:00:00`	+09:00 → +08:00	`+08`	No	overlap
`1992-01-18T18:00:00Z`	`1992-01-19 03:00:00`	+08:00 → +09:00	`+09`	No	gap
`1992-03-28T17:00:00Z`	`1992-03-29 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1992-09-26T17:00:00Z`	`1992-09-27 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1993-03-27T17:00:00Z`	`1993-03-28 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1993-09-25T17:00:00Z`	`1993-09-26 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1994-03-26T17:00:00Z`	`1994-03-27 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1994-09-24T17:00:00Z`	`1994-09-25 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1995-03-25T17:00:00Z`	`1995-03-26 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1995-09-23T17:00:00Z`	`1995-09-24 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1996-03-30T17:00:00Z`	`1996-03-31 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1996-10-26T17:00:00Z`	`1996-10-27 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1997-03-29T17:00:00Z`	`1997-03-30 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1997-10-25T17:00:00Z`	`1997-10-26 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1998-03-28T17:00:00Z`	`1998-03-29 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1998-10-24T17:00:00Z`	`1998-10-25 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`1999-03-27T17:00:00Z`	`1999-03-28 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`1999-10-30T17:00:00Z`	`1999-10-31 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2000-03-25T17:00:00Z`	`2000-03-26 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2000-10-28T17:00:00Z`	`2000-10-29 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2001-03-24T17:00:00Z`	`2001-03-25 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2001-10-27T17:00:00Z`	`2001-10-28 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2002-03-30T17:00:00Z`	`2002-03-31 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2002-10-26T17:00:00Z`	`2002-10-27 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2003-03-29T17:00:00Z`	`2003-03-30 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2003-10-25T17:00:00Z`	`2003-10-26 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2004-03-27T17:00:00Z`	`2004-03-28 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2004-10-30T17:00:00Z`	`2004-10-31 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2005-03-26T17:00:00Z`	`2005-03-27 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2005-10-29T17:00:00Z`	`2005-10-30 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2006-03-25T17:00:00Z`	`2006-03-26 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2006-10-28T17:00:00Z`	`2006-10-29 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2007-03-24T17:00:00Z`	`2007-03-25 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2007-10-27T17:00:00Z`	`2007-10-28 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2008-03-29T17:00:00Z`	`2008-03-30 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2008-10-25T17:00:00Z`	`2008-10-26 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2009-03-28T17:00:00Z`	`2009-03-29 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2009-10-24T17:00:00Z`	`2009-10-25 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2010-03-27T17:00:00Z`	`2010-03-28 03:00:00`	+09:00 → +10:00	`+10`	Yes	gap
`2010-10-30T17:00:00Z`	`2010-10-31 02:00:00`	+10:00 → +09:00	`+09`	No	overlap
`2011-03-26T17:00:00Z`	`2011-03-27 03:00:00`	+09:00 → +10:00	`+10`	No	gap
`2014-10-25T16:00:00Z`	`2014-10-26 01:00:00`	+10:00 → +09:00	`+09`	No	overlap

Notes from the Maintainers

Source: europe (Lines 3321 to 3358)

From Tim Parenti (2014-07-03), per Oscar van Vlijmen (2009-11-29):
Asia/Yakutsk covers...
28	RU-AMU	Amur Oblast

...and parts of (14, RU-SA) Sakha (Yakutia) Republic:
14-02	****	Aldansky District
14-04	****	Amginsky District
14-05	****	Anabarsky District
14-06	****	Bulunsky District
14-07	****	Verkhnevilyuysky District
14-10	****	Vilyuysky District
14-11	****	Gorny District
14-12	****	Zhigansky District
14-13	****	Kobyaysky District
14-14	****	Lensky District
14-15	****	Megino-Kangalassky District
14-16	****	Mirninsky District
14-18	****	Namsky District
14-19	****	Neryungrinsky District
14-21	****	Nyurbinsky District
14-23	****	Olenyoksky District
14-24	****	Olyokminsky District
14-26	****	Suntarsky District
14-27	****	Tattinsky District
14-29	****	Ust-Aldansky District
14-32	****	Khangalassky District
14-33	****	Churapchinsky District
14-34	****	Eveno-Bytantaysky National District

From Tim Parenti (2014-07-03):
Our commentary seems to have lost mention of (14-19) Neryungrinsky District.
Since the surrounding districts of Sakha are all YAKT, assume this is, too.
Also assume its history has been the same as the rest of Asia/Yakutsk.

Byalokoz 1919 says Yakutsk was 8:38:58.

Attributed Statements:

Tim Parenti (2014-07-03):

Asia/Yakutsk covers... 28 RU-AMU Amur Oblast ...and parts of (14, RU-SA) Sakha (Yakutia) Republic: 14-02 **** Aldansky District 14-04 **** Amginsky District 14-05 **** Anabarsky District 14-06 **** Bulunsky District 14-07 **** Verkhnevilyuysky District 14-10 **** Vilyuysky District 14-11 **** Gorny District 14-12 **** Zhigansky District 14-13 **** Kobyaysky District 14-14 **** Lensky District 14-15 **** Megino-Kangalassky District 14-16 **** Mirninsky District 14-18 **** Namsky District 14-19 **** Neryungrinsky District 14-21 **** Nyurbinsky District 14-23 **** Olenyoksky District 14-24 **** Olyokminsky District 14-26 **** Suntarsky District 14-27 **** Tattinsky District 14-29 **** Ust-Aldansky District 14-32 **** Khangalassky District 14-33 **** Churapchinsky District 14-34 **** Eveno-Bytantaysky National District

Tim Parenti (2014-07-03):

Our commentary seems to have lost mention of (14-19) Neryungrinsky District. Since the surrounding districts of Sakha are all YAKT, assume this is, too. Also assume its history has been the same as the rest of Asia/Yakutsk. Byalokoz 1919 says Yakutsk was 8:38:58.

Years on Record

Methodology Note: The 1970 Rule

tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.