Falkland Islands time zone history
The Falkland Islands has changed its standard time 3 times since 1970, the most of the 8 zones on Atlantic islands. On standard time, clocks at Stanley run 51 minutes ahead of local mean solar time, the third-largest gap of the 8 zones on Atlantic islands. Daylight saving time was used in 28 years since 1970, last in 2010; under the current rules the clocks no longer change.
UTC−3
Standard time is UTC−3 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 | |||
| January 1, 1890 | Local mean time (UTC−3:51:24) replaced | UTC−3:51:24 | SMT |
| March 12, 1912 | Standard time back 9 minutes | UTC−4 | numeric only |
| Since 1970 | |||
| May 1, 1983 | Standard time forward 1 hour | UTC−3 | numeric only |
| September 15, 1985 | Summer offset kept as standard time; clocks did not move | UTC−4 | numeric only |
| September 5, 2010 | Standard time forward 1 hour | UTC−3 | numeric only |
Daylight saving periods
| Years | Clocks go forward | Clocks go back | Shift and labels |
|---|---|---|---|
| Before 1970 | |||
| 1937 | September 26 | not that year | 1 hour |
| 1938 | September 25 | March 20 | 1 hour |
| 1939 | October 1 | March 19 | 1 hour |
| 1940–1942 | last Sunday in September, 00:00 | fourth Sunday in March, 00:00 | 1 hour |
| 1943 | not that year | January 1 | 1 hour |
| Since 1970 | |||
| 1983 | September 25 | not that year | 1 hour |
| 1984 | September 16 | April 29 | 1 hour |
| 1985 | not that year | April 28 | 1 hour |
| 1986–1989 | second Sunday in September, 00:00 | third Sunday in April, 00:00 | 1 hour |
| 1990 | September 9 | April 22 | 1 hour |
| 1991 | September 15 | April 21 | 1 hour |
| 1992–1995 | second Sunday in September, 00:00 | third Sunday in April, 00:00 | 1 hour |
| 1996 | September 15 | April 21 | 1 hour |
| 1997–2000 | second Sunday in September, 00:00 | third Sunday in April, 00:00 | 1 hour |
| 2001–2009 | first Sunday in September, 02:00 | third Sunday in April, 02:00 | 1 hour |
| 2010 | not that year | April 18 | 1 hour |
Also on UTC−3
Ushuaia (Argentina), Rio Gallegos (Argentina), Punta Arenas (Chile), Coyhaique (Chile), Palmer Station (Antarctica), Rothera Station (Antarctica), Uruguay, Buenos Aires (Argentina), San Luis (Argentina) and Mendoza (Argentina) (nearest first; 19 more on the list of offsets).
Clocks next door since 1970
- Ushuaia (Argentina) (775 km): same time except 9,597 days in 1970–2010.
- Rio Gallegos (Argentina) (783 km): same time except 9,599 days in 1970–2010.
- Punta Arenas (Chile) (899 km): same time except 5,155 days in 1970–2014 and 2016.
- Coyhaique (Chile) (1,244 km): same time except 6,268 days in 1970–2014 and 2016–2024.
- South Georgia and the South Sandwich Islands (1,449 km): usually 1 hour ahead; different on 8,901 days in 1970–2010.