America/Matamoros

Time zone identifier: America/Matamoros

Current civil offset: -06:00 (CST)

Current DST state: Observing Standard Time

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

Local Mean Time (LMT): -06:30 based on geographic meridian

Total recorded transitions: 87 transitions across 3 distinct offsets

Associated countries: MX

Historical Offset Step Chart (1880 to Present)

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

Complete Transition History (87 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1922-01-01T06:00:00Z`	`1922-01-01 00:00:00`	-06:30 → -06:00	`CST`	No	gap
`1988-04-03T08:00:00Z`	`1988-04-03 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1988-10-30T07:00:00Z`	`1988-10-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1996-04-07T08:00:00Z`	`1996-04-07 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1996-10-27T07:00:00Z`	`1996-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1997-04-06T08:00:00Z`	`1997-04-06 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1997-10-26T07:00:00Z`	`1997-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1998-04-05T08:00:00Z`	`1998-04-05 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1998-10-25T07:00:00Z`	`1998-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1999-04-04T08:00:00Z`	`1999-04-04 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1999-10-31T07:00:00Z`	`1999-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2000-04-02T08:00:00Z`	`2000-04-02 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2000-10-29T07:00:00Z`	`2000-10-29 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2001-05-06T08:00:00Z`	`2001-05-06 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2001-09-30T07:00:00Z`	`2001-09-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2002-04-07T08:00:00Z`	`2002-04-07 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2002-10-27T07:00:00Z`	`2002-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2003-04-06T08:00:00Z`	`2003-04-06 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2003-10-26T07:00:00Z`	`2003-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2004-04-04T08:00:00Z`	`2004-04-04 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2004-10-31T07:00:00Z`	`2004-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2005-04-03T08:00:00Z`	`2005-04-03 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2005-10-30T07:00:00Z`	`2005-10-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2006-04-02T08:00:00Z`	`2006-04-02 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2006-10-29T07:00:00Z`	`2006-10-29 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2007-04-01T08:00:00Z`	`2007-04-01 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2007-10-28T07:00:00Z`	`2007-10-28 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2008-04-06T08:00:00Z`	`2008-04-06 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2008-10-26T07:00:00Z`	`2008-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2009-04-05T08:00:00Z`	`2009-04-05 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2009-10-25T07:00:00Z`	`2009-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2010-03-14T08:00:00Z`	`2010-03-14 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2010-11-07T07:00:00Z`	`2010-11-07 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2011-03-13T08:00:00Z`	`2011-03-13 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2011-11-06T07:00:00Z`	`2011-11-06 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2012-03-11T08:00:00Z`	`2012-03-11 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2012-11-04T07:00:00Z`	`2012-11-04 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2013-03-10T08:00:00Z`	`2013-03-10 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2013-11-03T07:00:00Z`	`2013-11-03 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2014-03-09T08:00:00Z`	`2014-03-09 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2014-11-02T07:00:00Z`	`2014-11-02 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2015-03-08T08:00:00Z`	`2015-03-08 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2015-11-01T07:00:00Z`	`2015-11-01 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2016-03-13T08:00:00Z`	`2016-03-13 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2016-11-06T07:00:00Z`	`2016-11-06 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2017-03-12T08:00:00Z`	`2017-03-12 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2017-11-05T07:00:00Z`	`2017-11-05 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2018-03-11T08:00:00Z`	`2018-03-11 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2018-11-04T07:00:00Z`	`2018-11-04 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2019-03-10T08:00:00Z`	`2019-03-10 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2019-11-03T07:00:00Z`	`2019-11-03 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2020-03-08T08:00:00Z`	`2020-03-08 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2020-11-01T07:00:00Z`	`2020-11-01 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2021-03-14T08:00:00Z`	`2021-03-14 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2021-11-07T07:00:00Z`	`2021-11-07 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2022-03-13T08:00:00Z`	`2022-03-13 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2022-11-06T07:00:00Z`	`2022-11-06 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2023-03-12T08:00:00Z`	`2023-03-12 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2023-11-05T07:00:00Z`	`2023-11-05 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2024-03-10T08:00:00Z`	`2024-03-10 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2024-11-03T07:00:00Z`	`2024-11-03 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2025-03-09T08:00:00Z`	`2025-03-09 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2025-11-02T07:00:00Z`	`2025-11-02 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2026-03-08T08:00:00Z`	`2026-03-08 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2026-11-01T07:00:00Z`	`2026-11-01 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2027-03-14T08:00:00Z`	`2027-03-14 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2027-11-07T07:00:00Z`	`2027-11-07 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2028-03-12T08:00:00Z`	`2028-03-12 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2028-11-05T07:00:00Z`	`2028-11-05 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2029-03-11T08:00:00Z`	`2029-03-11 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2029-11-04T07:00:00Z`	`2029-11-04 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2030-03-10T08:00:00Z`	`2030-03-10 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2030-11-03T07:00:00Z`	`2030-11-03 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2031-03-09T08:00:00Z`	`2031-03-09 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2031-11-02T07:00:00Z`	`2031-11-02 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2032-03-14T08:00:00Z`	`2032-03-14 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2032-11-07T07:00:00Z`	`2032-11-07 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2033-03-13T08:00:00Z`	`2033-03-13 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2033-11-06T07:00:00Z`	`2033-11-06 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2034-03-12T08:00:00Z`	`2034-03-12 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2034-11-05T07:00:00Z`	`2034-11-05 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2035-03-11T08:00:00Z`	`2035-03-11 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2035-11-04T07:00:00Z`	`2035-11-04 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2036-03-09T08:00:00Z`	`2036-03-09 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2036-11-02T07:00:00Z`	`2036-11-02 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2037-03-08T08:00:00Z`	`2037-03-08 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2037-11-01T07:00:00Z`	`2037-11-01 01:00:00`	-05:00 → -06:00	`CST`	No	overlap

Notes from the Maintainers

Source: northamerica (Lines 2890 to 2897)

Coahuila, Nuevo León, Tamaulipas (near US border)
This includes the following municipios:
in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava,
Ocampo, Piedras Negras, Villa Unión, Zaragoza
in Nuevo León: Anáhuac
in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022

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.