Time Zone History

Cuba time zone history

Under the current rules, summer time lasts 310 days in 2027, the longest of the 101 zones with summer time. On standard time, clocks in Havana run 29 minutes ahead of local mean solar time.

UTC−5

Standard time is UTC−5 (CDT/CST); the clocks change on dates set year by year.

tz database name America/Havana

Convert a time from Cuba

Summer time in every year since 1970

UTC−5:29:36, UTC−5:29:28: behind today’s standard timeUTC−5: today’s standard timeUTC−4: 1 hour ahead of today’s standard timeUTC−5:29:36, UTC−5:29:28: behindtoday’s standard timeUTC−5: today’s standard timeUTC−4: 1 hour ahead of today’sstandard time

How to read this chart

Before 1970

18801900192019401960188019201960
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
January 1, 1890Local mean time (UTC−5:29:28) replacedUTC−5:29:36HMT
July 19, 1925Standard time forward 30 minutesUTC−5CST

Daylight saving periods

YearsClocks go forwardClocks go backShift and labels
Before 1970
1928June 10October 101 hour, CST to CDT
1940–1942first Sunday in June, 00:00first Sunday in September, 00:001 hour, CST to CDT
1945–1946first Sunday in June, 00:00first Sunday in September, 00:001 hour, CST to CDT
1965June 1September 301 hour, CST to CDT
1966May 29October 21 hour, CST to CDT
1967April 8September 101 hour, CST to CDT
1968April 14September 81 hour, CST to CDT
1969–1971last Sunday in April, 00:00last Sunday in October, 00:001 hour, CST to CDT
Since 1970
1972–1974last Sunday in April, 00:008 October, 00:001 hour, CST to CDT
1975–1977last Sunday in April, 00:00last Sunday in October, 00:001 hour, CST to CDT
1978May 7October 81 hour, CST to CDT
1979–1980third Sunday in March, 00:00second Sunday in October, 00:001 hour, CST to CDT
1981–1983second Sunday in May, 00:00second Sunday in October, 00:001 hour, CST to CDT
1984–1985first Sunday in May, 00:00second Sunday in October, 00:001 hour, CST to CDT
1986–1989third Sunday in March, 00:00second Sunday in October, 00:001 hour, CST to CDT
1990–1995first Sunday in April, 00:00second Sunday in October, 00:001 hour, CST to CDT
1996April 7October 61 hour, CST to CDT
1997April 6October 121 hour, CST to CDT
1998–1999last Sunday in March, 00:00last Sunday in October, 01:001 hour, CST to CDT
2000–2003first Sunday in April, 00:00last Sunday in October, 01:001 hour, CST to CDT
2004March 28not that year1 hour, CST to CDT
2006not that yearOctober 291 hour
2007March 11October 281 hour, CST to CDT
2008March 16October 261 hour, CST to CDT
2009–2010second Sunday in March, 00:00last Sunday in October, 01:001 hour, CST to CDT
2011March 20November 131 hour, CST to CDT
2012April 1November 41 hour, CST to CDT
2013–2025second Sunday in March, 00:00first Sunday in November, 01:001 hour, CST to CDT
2026March 8not that year1 hour, CST to CDT
2027not that yearNovember 71 hour, CST to CDT
2028–2037second Sunday in March, 00:00first Sunday in November, 01:001 hour, CST to CDT

Clock changes in 2026, 2027 and 2028

The clocks go forward 1 hour (CST to CDT) on March 8, 2026 and March 12, 2028 at 00:00 and back 1 hour (CDT to CST) on November 7, 2027 and November 5, 2028 at 01:00, local time.

Also on UTC−5

Cancún (Mexico), Jamaica, Haiti, Turks and Caicos Islands, Monticello, Kentucky (United States), Panama, Louisville, Kentucky (United States), Marengo, Indiana (United States), Vevay, Indiana (United States) and Petersburg, Indiana (United States) (nearest first; 13 more on the list of offsets).

Clocks next door since 1970

  • Cancún (Mexico) (507 km): usually 1 hour behind; different on 7,134 days in 1970–2026; same time today.
  • Mérida (Mexico) (785 km): usually 1 hour behind; different on 6,628 days in 1970–2026.
  • Jamaica (816 km): usually 1 hour behind; different on 10,418 days in 1970–2004 and 2006–2026; same time today.
  • Belize (873 km): usually 2 hours behind; different on 8,744 days in 1970–2004 and 2006–2026; 1 hour behind today.
  • Honduras (1,127 km): usually 2 hours behind; different on 9,130 days in 1970–2004 and 2006–2026; 1 hour behind today.

How it compares

Standard time has stayed at UTC−5 since 1925.