Historically distinct IANA time zone
America/Mexico_City
- Countries
- Mexico
- GPS reference
- 19.40° N, 99.15° W
- Data source
- IANA northamerica
- Aliases
- Mexico/General
- Rule groups
- Mexico
MexicoCentral Mexico
Geographic context
Where this clock belongs
The map marks the IANA reference location and associated country, not a time-zone boundary.
GPS reference: 19.40° N, 99.15° 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
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.
Civil-time record
Recorded changes over time
From 1922 to 2022 · 68 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.
- -07:00 · MSTStandard time applies
- -06:00 · CSTStandard time applies
- -07:00 · MSTStandard time applies
- -06:00 · MDTDaylight saving time begins
- -07:00 · MSTStandard time applies
- -06:00 · CSTStandard time applies
Browse every recorded transition
| Local time after transition | Offset after | Abbreviation | Rule |
|---|---|---|---|
| 1922-01-01 00:00 | -07:00 | MST | Standard time |
| 1927-06-10 01:00 | -06:00 | CST | Standard time |
| 1930-11-14 23:00 | -07:00 | MST | Standard time |
| 1931-04-30 01:00 | -06:00 | MDT | Daylight saving time |
| 1931-09-30 23:00 | -07:00 | MST | Standard time |
| 1932-04-01 01:00 | -06:00 | CST | Standard time |
| 1939-02-05 01:00 | -05:00 | CDT | Daylight saving time |
| 1939-06-24 23:00 | -06:00 | CST | Standard time |
| 1940-12-09 01:00 | -05:00 | CDT | Daylight saving time |
| 1941-03-31 23:00 | -06:00 | CST | Standard time |
| 1943-12-16 01:00 | -05:00 | CWT | Daylight saving time |
| 1944-04-30 23:00 | -06:00 | CST | Standard time |
| 1950-02-12 01:00 | -05:00 | CDT | Daylight saving time |
| 1950-07-29 23:00 | -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 |
| 2010-04-04 03:00 | -05:00 | CDT | Daylight saving time |
| 2010-10-31 01:00 | -06:00 | CST | Standard time |
| 2011-04-03 03:00 | -05:00 | CDT | Daylight saving time |
| 2011-10-30 01:00 | -06:00 | CST | Standard time |
| 2012-04-01 03:00 | -05:00 | CDT | Daylight saving time |
| 2012-10-28 01:00 | -06:00 | CST | Standard time |
| 2013-04-07 03:00 | -05:00 | CDT | Daylight saving time |
| 2013-10-27 01:00 | -06:00 | CST | Standard time |
| 2014-04-06 03:00 | -05:00 | CDT | Daylight saving time |
| 2014-10-26 01:00 | -06:00 | CST | Standard time |
| 2015-04-05 03:00 | -05:00 | CDT | Daylight saving time |
| 2015-10-25 01:00 | -06:00 | CST | Standard time |
| 2016-04-03 03:00 | -05:00 | CDT | Daylight saving time |
| 2016-10-30 01:00 | -06:00 | CST | Standard time |
| 2017-04-02 03:00 | -05:00 | CDT | Daylight saving time |
| 2017-10-29 01:00 | -06:00 | CST | Standard time |
| 2018-04-01 03:00 | -05:00 | CDT | Daylight saving time |
| 2018-10-28 01:00 | -06:00 | CST | Standard time |
| 2019-04-07 03:00 | -05:00 | CDT | Daylight saving time |
| 2019-10-27 01:00 | -06:00 | CST | Standard time |
| 2020-04-05 03:00 | -05:00 | CDT | Daylight saving time |
| 2020-10-25 01:00 | -06:00 | CST | Standard time |
| 2021-04-04 03:00 | -05:00 | CDT | Daylight saving time |
| 2021-10-31 01:00 | -06:00 | CST | Standard time |
| 2022-04-03 03:00 | -05:00 | CDT | Daylight saving time |
| 2022-10-30 01:00 | -06:00 | CST | Standard time |