Time Zone History

Chihuahua time zone history

Daylight saving time was used in 27 years since 1970, last in 2022; under the current rules the clocks no longer change. On standard time, clocks at Chihuahua run 1 hour 4 minutes ahead of local mean solar time, the largest gap of the 10 zones in Mexico whose clocks run ahead of the sun. On October 30, 2022 the summer offset, UTC−6, became permanent standard time; the clocks did not move that day.

UTC−6

Standard time is UTC−6 (CST) all year under the current rules.

Covers: Chihuahua (most areas) · tz database name America/Chihuahua

Convert a time from Chihuahua

Summer time in 27 of 57 years since 1970

UTC−7:04:20, UTC−7: behind today’s standard timeUTC−6: today’s standard timeUTC−5: 1 hour ahead of today’s standard timeUTC−7:04:20, UTC−7: behind today’sstandard timeUTC−6: today’s standard timeUTC−5: 1 hour ahead of today’sstandard time

How to read this chart

Before 1970

19101920193019401950196019701910192019301940195019601970
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
December 31, 1921Local mean time (UTC−7:04:20) replacedUTC−7MST
June 10, 1927Standard time forward 1 hourUTC−6CST
November 15, 1930Standard time back 1 hourUTC−7MST
April 1, 1932Standard time forward 1 hourUTC−6CST
Since 1970
April 5, 1998Summer offset kept as standard time; clocks did not moveUTC−7MST
October 30, 2022Summer offset kept as standard time; clocks did not moveUTC−6CST

Daylight saving periods

YearsClocks go forwardClocks go backShift and labels
Before 1970
1931April 30October 11 hour, MST to MDT
Since 1970
1996–1997first Sunday in April, 02:00last Sunday in October, 02:001 hour, CST to CDT
1998not that yearOctober 251 hour
1999–2000first Sunday in April, 02:00last Sunday in October, 02:001 hour, MST to MDT
2001May 6September 301 hour, MST to MDT
2002–2021first Sunday in April, 02:00last Sunday in October, 02:001 hour, MST to MDT
2022April 3not that year1 hour, MST to MDT

Also on UTC−6

Ojinaga (Mexico), Monterrey (Mexico), Bahía de Banderas (Mexico), Matamoros (Mexico), Mexico City (Mexico), Mérida (Mexico), New Salem, North Dakota (United States), Tell City, Indiana (United States), Center, North Dakota (United States) and Beulah, North Dakota (United States) (nearest first; 17 more on the list of offsets).

Clocks next door since 1970

  • Ojinaga (192 km): same time except 1,344 days in 2010–2026.
  • Ciudad Juárez (347 km): same time except 933 days in 2010–2026; 1 hour behind today.
  • Hermosillo (478 km): usually 1 hour behind; different on 4,061 days in 1996–2022.
  • Mazatlan (603 km): usually 1 hour behind; different on 8,974 days in 1996–2022.
  • Monterrey (659 km): same time except 9,183 days in 1988 and 1998–2022.