W-SU
Time zone identifier: W-SU
Current civil offset: +03:00 (MSK)
Current DST state: Observing Standard Time
First standard time adoption: Adopted on 1879-12-31
Local Mean Time (LMT): +02:30:17 based on geographic meridian
Total recorded transitions: 78 transitions across 8 distinct offsets
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Historical Offset Step Chart (1880 to Present)
Text summary: W-SU shifted between 8 distinct offsets from 1879-12-31 through the modern era.
Complete Transition History (78 Transitions)
| UTC Instant | Local Wall Time | Shift | Abbreviation | DST | Effect |
|---|---|---|---|---|---|
1879-12-31T21:29:43Z | 1880-01-01 00:00:00 | +02:30:17 → +02:30:17 | MMT | No | offset-only |
1916-07-02T21:29:43Z | 1916-07-03 00:01:02 | +02:30:17 → +02:31:19 | MMT | No | gap |
1917-07-01T20:28:41Z | 1917-07-02 00:00:00 | +02:31:19 → +03:31:19 | MST | Yes | gap |
1917-12-27T20:28:41Z | 1917-12-27 23:00:00 | +03:31:19 → +02:31:19 | MMT | No | overlap |
1918-05-31T19:28:41Z | 1918-06-01 00:00:00 | +02:31:19 → +04:31:19 | MDST | Yes | gap |
1918-09-15T20:28:41Z | 1918-09-16 00:00:00 | +04:31:19 → +03:31:19 | MST | Yes | overlap |
1919-05-31T19:28:41Z | 1919-06-01 00:00:00 | +03:31:19 → +04:31:19 | MDST | Yes | gap |
1919-07-01T00:00:00Z | 1919-07-01 04:00:00 | +04:31:19 → +04:00 | MSD | Yes | overlap |
1919-08-15T20:00:00Z | 1919-08-15 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1921-02-14T20:00:00Z | 1921-02-15 00:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1921-03-20T19:00:00Z | 1921-03-21 00:00:00 | +04:00 → +05:00 | +05 | Yes | gap |
1921-08-31T19:00:00Z | 1921-08-31 23:00:00 | +05:00 → +04:00 | MSD | Yes | overlap |
1921-09-30T20:00:00Z | 1921-09-30 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1922-09-30T21:00:00Z | 1922-09-30 23:00:00 | +03:00 → +02:00 | EET | No | overlap |
1930-06-20T22:00:00Z | 1930-06-21 01:00:00 | +02:00 → +03:00 | MSK | No | gap |
1981-03-31T21:00:00Z | 1981-04-01 01:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1981-09-30T20:00:00Z | 1981-09-30 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1982-03-31T21:00:00Z | 1982-04-01 01:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1982-09-30T20:00:00Z | 1982-09-30 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1983-03-31T21:00:00Z | 1983-04-01 01:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1983-09-30T20:00:00Z | 1983-09-30 23:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1984-03-31T21:00:00Z | 1984-04-01 01:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1984-09-29T23:00:00Z | 1984-09-30 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1985-03-30T23:00:00Z | 1985-03-31 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1985-09-28T23:00:00Z | 1985-09-29 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1986-03-29T23:00:00Z | 1986-03-30 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1986-09-27T23:00:00Z | 1986-09-28 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1987-03-28T23:00:00Z | 1987-03-29 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1987-09-26T23:00:00Z | 1987-09-27 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1988-03-26T23:00:00Z | 1988-03-27 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1988-09-24T23:00:00Z | 1988-09-25 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1989-03-25T23:00:00Z | 1989-03-26 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1989-09-23T23:00:00Z | 1989-09-24 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1990-03-24T23:00:00Z | 1990-03-25 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1990-09-29T23:00:00Z | 1990-09-30 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1991-03-30T23:00:00Z | 1991-03-31 02:00:00 | +03:00 → +03:00 | EEST | Yes | offset-only |
1991-09-29T00:00:00Z | 1991-09-29 02:00:00 | +03:00 → +02:00 | EET | No | overlap |
1992-01-19T00:00:00Z | 1992-01-19 03:00:00 | +02:00 → +03:00 | MSK | No | gap |
1992-03-28T23:00:00Z | 1992-03-29 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1992-09-26T23:00:00Z | 1992-09-27 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1993-03-27T23:00:00Z | 1993-03-28 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1993-09-25T23:00:00Z | 1993-09-26 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1994-03-26T23:00:00Z | 1994-03-27 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1994-09-24T23:00:00Z | 1994-09-25 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1995-03-25T23:00:00Z | 1995-03-26 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1995-09-23T23:00:00Z | 1995-09-24 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1996-03-30T23:00:00Z | 1996-03-31 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1996-10-26T23:00:00Z | 1996-10-27 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1997-03-29T23:00:00Z | 1997-03-30 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1997-10-25T23:00:00Z | 1997-10-26 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1998-03-28T23:00:00Z | 1998-03-29 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1998-10-24T23:00:00Z | 1998-10-25 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
1999-03-27T23:00:00Z | 1999-03-28 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
1999-10-30T23:00:00Z | 1999-10-31 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2000-03-25T23:00:00Z | 2000-03-26 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2000-10-28T23:00:00Z | 2000-10-29 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2001-03-24T23:00:00Z | 2001-03-25 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2001-10-27T23:00:00Z | 2001-10-28 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2002-03-30T23:00:00Z | 2002-03-31 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2002-10-26T23:00:00Z | 2002-10-27 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2003-03-29T23:00:00Z | 2003-03-30 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2003-10-25T23:00:00Z | 2003-10-26 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2004-03-27T23:00:00Z | 2004-03-28 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2004-10-30T23:00:00Z | 2004-10-31 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2005-03-26T23:00:00Z | 2005-03-27 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2005-10-29T23:00:00Z | 2005-10-30 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2006-03-25T23:00:00Z | 2006-03-26 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2006-10-28T23:00:00Z | 2006-10-29 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2007-03-24T23:00:00Z | 2007-03-25 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2007-10-27T23:00:00Z | 2007-10-28 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2008-03-29T23:00:00Z | 2008-03-30 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2008-10-25T23:00:00Z | 2008-10-26 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2009-03-28T23:00:00Z | 2009-03-29 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2009-10-24T23:00:00Z | 2009-10-25 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2010-03-27T23:00:00Z | 2010-03-28 03:00:00 | +03:00 → +04:00 | MSD | Yes | gap |
2010-10-30T23:00:00Z | 2010-10-31 02:00:00 | +04:00 → +03:00 | MSK | No | overlap |
2011-03-26T23:00:00Z | 2011-03-27 03:00:00 | +03:00 → +04:00 | MSK | No | gap |
2014-10-25T22:00:00Z | 2014-10-26 01:00:00 | +04:00 → +03:00 | MSK | No | overlap |
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.