Monterrey time zone history
Daylight saving time was used in 28 years since 1970, last in 2022; under the current rules the clocks no longer change. On standard time, clocks in Monterrey run 41 minutes ahead of local mean solar time.
UTC−6
Standard time is UTC−6 (CST) all year under the current rules.
Summer time in 28 of 57 years since 1970
Before 1970
Standard time changes
| Date | Change | New standard time | Clock label |
|---|---|---|---|
| Before 1970 | |||
| December 31, 1921 | Local mean time (UTC−6:41:16) replaced | UTC−7 | MST |
| June 10, 1927 | Standard time forward 1 hour | UTC−6 | CST |
| November 15, 1930 | Standard time back 1 hour | UTC−7 | MST |
| April 1, 1932 | Standard time forward 1 hour | UTC−6 | CST |
Daylight saving periods
| Years | Clocks go forward | Clocks go back | Shift and labels |
|---|---|---|---|
| Before 1970 | |||
| 1931 | April 30 | October 1 | 1 hour, MST to MDT |
| Since 1970 | |||
| 1988 | April 3 | October 30 | 1 hour, CST to CDT |
| 1996–2000 | first Sunday in April, 02:00 | last Sunday in October, 02:00 | 1 hour, CST to CDT |
| 2001 | May 6 | September 30 | 1 hour, CST to CDT |
| 2002–2022 | first Sunday in April, 02:00 | last Sunday in October, 02:00 | 1 hour, CST to CDT |
Also on UTC−6
Matamoros (Mexico), Ojinaga (Mexico), Chihuahua (Mexico), Mexico City (Mexico), Bahía de Banderas (Mexico), Mérida (Mexico), Belize, Guatemala, El Salvador and Tell City, Indiana (United States) (nearest first; 17 more on the list of offsets).
Clocks next door since 1970
- Matamoros (283 km): same time except 1,351 days in 2010–2026.
- Ojinaga (593 km): same time except 9,743 days in 1988 and 1998–2026.
- Chihuahua (659 km): same time except 9,183 days in 1988 and 1998–2022.
- Mazatlan (675 km): usually 1 hour behind; different on 212 days in 1988 and 1996–2022.
- Mexico City (707 km): same time except 210 days in 1988.
How it compares
Standard time has stayed at UTC−6 since 1932.