Historically distinct IANA time zone
America/Matamoros
- Countries
- Mexico
- GPS reference
- 25.83° N, 97.50° W
- Data source
- IANA northamerica
- Aliases
- None
MexicoCoahuila, Nuevo Leon, Tamaulipas (US border)
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 25.83° N, 97.50° W. Associated countries: MX.
The Wikipedia link provides additional context; it is not evidence for a historical claim. Transition data comes from the IANA source file.
Notes from the time database
The story behind the clock
These source notes describe a period or rule. They do not, by themselves, establish a causal claim for a particular clock change.
War
War
Peace
Original IANA source file: northamerica.
A shared present
Same clock today, different past
These nearby zones follow the same current annual pattern, yet retain their own historical record.
- America/OjinagaMexico · 797 km from the reference location · Same annual clock since 2023
- America/Indiana/Tell_CityUnited States of America · 1684 km from the reference location · Same annual clock since 2010
- America/Indiana/KnoxUnited States of America · 1989 km from the reference location · Same annual clock since 2010
United States of America · 1684 km from the reference location · Same annual clock since 2010Civil-time record
Recorded changes over time
From 1922 to 2027 · 67 recorded transitions
Recurring daylight-saving changes are grouped separately when JavaScript is available.
Notable changes
One-off changes and transitions outside the recurring seasonal rhythm.
- -06:00 · CSTStandard time applies
- -05:00 · CDTDaylight saving time begins
- -06:00 · CSTStandard time applies
- -05:00 · CDTDaylight saving time begins
- -06:00 · CSTStandard time applies
- -05:00 · CDTDaylight saving time begins
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1922-01-01 00:00 | -06:00 | CST | Standard time |
| 1988-04-03 03:00 | -05:00 | CDT | Daylight saving time |
| 1988-10-30 01:00 | -06:00 | CST | Standard time |
| 1996-04-07 03:00 | -05:00 | CDT | Daylight saving time |
| 1996-10-27 01:00 | -06:00 | CST | Standard time |
| 1997-04-06 03:00 | -05:00 | CDT | Daylight saving time |
| 1997-10-26 01:00 | -06:00 | CST | Standard time |
| 1998-04-05 03:00 | -05:00 | CDT | Daylight saving time |
| 1998-10-25 01:00 | -06:00 | CST | Standard time |
| 1999-04-04 03:00 | -05:00 | CDT | Daylight saving time |
| 1999-10-31 01:00 | -06:00 | CST | Standard time |
| 2000-04-02 03:00 | -05:00 | CDT | Daylight saving time |
| 2000-10-29 01:00 | -06:00 | CST | Standard time |
| 2001-05-06 03:00 | -05:00 | CDT | Daylight saving time |
| 2001-09-30 01:00 | -06:00 | CST | Standard time |
| 2002-04-07 03:00 | -05:00 | CDT | Daylight saving time |
| 2002-10-27 01:00 | -06:00 | CST | Standard time |
| 2003-04-06 03:00 | -05:00 | CDT | Daylight saving time |
| 2003-10-26 01:00 | -06:00 | CST | Standard time |
| 2004-04-04 03:00 | -05:00 | CDT | Daylight saving time |
| 2004-10-31 01:00 | -06:00 | CST | Standard time |
| 2005-04-03 03:00 | -05:00 | CDT | Daylight saving time |
| 2005-10-30 01:00 | -06:00 | CST | Standard time |
| 2006-04-02 03:00 | -05:00 | CDT | Daylight saving time |
| 2006-10-29 01:00 | -06:00 | CST | Standard time |
| 2007-04-01 03:00 | -05:00 | CDT | Daylight saving time |
| 2007-10-28 01:00 | -06:00 | CST | Standard time |
| 2008-04-06 03:00 | -05:00 | CDT | Daylight saving time |
| 2008-10-26 01:00 | -06:00 | CST | Standard time |
| 2009-04-05 03:00 | -05:00 | CDT | Daylight saving time |
| 2009-10-25 01:00 | -06:00 | CST | Standard time |
| 2010-03-14 03:00 | -05:00 | CDT | Daylight saving time |
| 2010-11-07 01:00 | -06:00 | CST | Standard time |
| 2011-03-13 03:00 | -05:00 | CDT | Daylight saving time |
| 2011-11-06 01:00 | -06:00 | CST | Standard time |
| 2012-03-11 03:00 | -05:00 | CDT | Daylight saving time |
| 2012-11-04 01:00 | -06:00 | CST | Standard time |
| 2013-03-10 03:00 | -05:00 | CDT | Daylight saving time |
| 2013-11-03 01:00 | -06:00 | CST | Standard time |
| 2014-03-09 03:00 | -05:00 | CDT | Daylight saving time |
| 2014-11-02 01:00 | -06:00 | CST | Standard time |
| 2015-03-08 03:00 | -05:00 | CDT | Daylight saving time |
| 2015-11-01 01:00 | -06:00 | CST | Standard time |
| 2016-03-13 03:00 | -05:00 | CDT | Daylight saving time |
| 2016-11-06 01:00 | -06:00 | CST | Standard time |
| 2017-03-12 03:00 | -05:00 | CDT | Daylight saving time |
| 2017-11-05 01:00 | -06:00 | CST | Standard time |
| 2018-03-11 03:00 | -05:00 | CDT | Daylight saving time |
| 2018-11-04 01:00 | -06:00 | CST | Standard time |
| 2019-03-10 03:00 | -05:00 | CDT | Daylight saving time |
| 2019-11-03 01:00 | -06:00 | CST | Standard time |
| 2020-03-08 03:00 | -05:00 | CDT | Daylight saving time |
| 2020-11-01 01:00 | -06:00 | CST | Standard time |
| 2021-03-14 03:00 | -05:00 | CDT | Daylight saving time |
| 2021-11-07 01:00 | -06:00 | CST | Standard time |
| 2022-03-13 03:00 | -05:00 | CDT | Daylight saving time |
| 2022-11-06 01:00 | -06:00 | CST | Standard time |
| 2023-03-12 03:00 | -05:00 | CDT | Daylight saving time |
| 2023-11-05 01:00 | -06:00 | CST | Standard time |
| 2024-03-10 03:00 | -05:00 | CDT | Daylight saving time |
| 2024-11-03 01:00 | -06:00 | CST | Standard time |
| 2025-03-09 03:00 | -05:00 | CDT | Daylight saving time |
| 2025-11-02 01:00 | -06:00 | CST | Standard time |
| 2026-03-08 03:00 | -05:00 | CDT | Daylight saving time |
| 2026-11-01 01:00 | -06:00 | CST | Standard time |
| 2027-03-14 03:00 | -05:00 | CDT | Daylight saving time |
| 2027-11-07 01:00 | -06:00 | CST | Standard time |