America/Mazatlan

Time zone identifier: America/Mazatlan

Current civil offset: -07:00 (MST)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1922-01-01

Local Mean Time (LMT): -07:05:40 based on geographic meridian

Total recorded transitions: 61 transitions across 3 distinct offsets

Associated countries: MX

Aliases (Link targets): Mexico/BajaSur

Historical Offset Step Chart (1880 to Present)

Text summary: America/Mazatlan shifted between 3 distinct offsets from 1922-01-01 through the modern era.

Complete Transition History (61 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1922-01-01T07:00:00Z`	`1922-01-01 00:00:00`	-07:05:40 → -07:00	`MST`	No	gap
`1927-06-10T07:00:00Z`	`1927-06-10 01:00:00`	-07:00 → -06:00	`CST`	No	gap
`1930-11-15T06:00:00Z`	`1930-11-14 23:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1931-04-30T07:00:00Z`	`1931-04-30 01:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1931-10-01T06:00:00Z`	`1931-09-30 23:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1932-04-01T07:00:00Z`	`1932-04-01 01:00:00`	-07:00 → -06:00	`CST`	No	gap
`1942-04-24T06:00:00Z`	`1942-04-23 23:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1996-04-07T09:00:00Z`	`1996-04-07 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1996-10-27T08:00:00Z`	`1996-10-27 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1997-04-06T09:00:00Z`	`1997-04-06 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1997-10-26T08:00:00Z`	`1997-10-26 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1998-04-05T09:00:00Z`	`1998-04-05 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1998-10-25T08:00:00Z`	`1998-10-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1999-04-04T09:00:00Z`	`1999-04-04 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1999-10-31T08:00:00Z`	`1999-10-31 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2000-04-02T09:00:00Z`	`2000-04-02 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2000-10-29T08:00:00Z`	`2000-10-29 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2001-05-06T09:00:00Z`	`2001-05-06 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2001-09-30T08:00:00Z`	`2001-09-30 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2002-04-07T09:00:00Z`	`2002-04-07 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2002-10-27T08:00:00Z`	`2002-10-27 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2003-04-06T09:00:00Z`	`2003-04-06 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2003-10-26T08:00:00Z`	`2003-10-26 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2004-04-04T09:00:00Z`	`2004-04-04 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2004-10-31T08:00:00Z`	`2004-10-31 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2005-04-03T09:00:00Z`	`2005-04-03 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2005-10-30T08:00:00Z`	`2005-10-30 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2006-04-02T09:00:00Z`	`2006-04-02 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2006-10-29T08:00:00Z`	`2006-10-29 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2007-04-01T09:00:00Z`	`2007-04-01 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2007-10-28T08:00:00Z`	`2007-10-28 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2008-04-06T09:00:00Z`	`2008-04-06 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2008-10-26T08:00:00Z`	`2008-10-26 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2009-04-05T09:00:00Z`	`2009-04-05 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2009-10-25T08:00:00Z`	`2009-10-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2010-04-04T09:00:00Z`	`2010-04-04 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2010-10-31T08:00:00Z`	`2010-10-31 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2011-04-03T09:00:00Z`	`2011-04-03 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2011-10-30T08:00:00Z`	`2011-10-30 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2012-04-01T09:00:00Z`	`2012-04-01 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2012-10-28T08:00:00Z`	`2012-10-28 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2013-04-07T09:00:00Z`	`2013-04-07 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2013-10-27T08:00:00Z`	`2013-10-27 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2014-04-06T09:00:00Z`	`2014-04-06 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2014-10-26T08:00:00Z`	`2014-10-26 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2015-04-05T09:00:00Z`	`2015-04-05 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2015-10-25T08:00:00Z`	`2015-10-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2016-04-03T09:00:00Z`	`2016-04-03 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2016-10-30T08:00:00Z`	`2016-10-30 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2017-04-02T09:00:00Z`	`2017-04-02 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2017-10-29T08:00:00Z`	`2017-10-29 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2018-04-01T09:00:00Z`	`2018-04-01 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2018-10-28T08:00:00Z`	`2018-10-28 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2019-04-07T09:00:00Z`	`2019-04-07 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2019-10-27T08:00:00Z`	`2019-10-27 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2020-04-05T09:00:00Z`	`2020-04-05 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2020-10-25T08:00:00Z`	`2020-10-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2021-04-04T09:00:00Z`	`2021-04-04 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2021-10-31T08:00:00Z`	`2021-10-31 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`2022-04-03T09:00:00Z`	`2022-04-03 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`2022-10-30T08:00:00Z`	`2022-10-30 01:00:00`	-06:00 → -07:00	`MST`	No	overlap

Notes from the Maintainers

Source: northamerica (Lines 2968 to 2969)

Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa

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.