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If present, a dagger (†) indicates the usage of a nautical time zone letter outside of the standard geographic definition of that time zone. Some zones that are north/south of each other in the mid-Pacific differ by 24 hours in time – they have the same time of day but dates that are one day apart. The two extreme time zones on Earth (both ...
The shift is the amount of time added at the DST start time and subtracted at the DST end time. For example, in Canada and the United States, when DST starts, the local time changes from 02:00 to 03:00, and when DST ends, the local time changes from 02:00 to 01:00. As the time change depends on the time zone, it does not occur simultaneously in ...
Map of U.S. time zones with new CST and EST areas displayed. Some U.S. time zones, such as the Samoa Time Zone, are not on this map. This is a list of the time offsets by U.S. states, federal district, and territories. For more about the time zones of the U.S. see time in the United States. Most states are entirely contained within one time zone.
The history of daylight saving time. Time zones in the U.S. were established by the Standard Time Act in 1918, which also introduced daylight savings, according to the U.S. Astronomical ...
Daylight saving time began in 2024 on Sunday, March 10, at 2 a.m. local time, when our clocks moved forward an hour, part of the twice-annual time change. Does every state observe daylight saving ...
The end of the time period means it will start to get dark outside earlier in the day.
Argentina is located at a longitude that would naturally put it in the UTC−04:00 or UTC−05:00 time zone. San Luis province, which was previously in a different time zone than most of the country and which formerly observed DST, decided in April 2010 not to change its clocks back and to stay on UTC−03:00 all year round.
When does daylight saving time end? Daylight saving time will end 2 a.m. Nov. 3, when clocks will be set back one hour to standard time. U.S. clocks will “spring ahead” for 2025 at 2 a.m. March 9.