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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.
In Ireland, what Irish law designates as "standard time" is observed during the summer, with clocks turned one hour ahead of UTC. [ 3 ] [ 4 ] The SDT column shows the abbreviation used during the winter, even in Ireland, and the DST column shows the abbreviation used during the summer, which is "IST", where the "S" in "IST" stands for "Standard ...
Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...
Eastern Daylight Time (EDT) is four hours behind Coordinated Universal Time (UTC−04:00). Observed during daylight saving time (spring/summer/early autumn in the United States and Canada). On the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT, creating a 23-hour day.
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
In 2024, daylight saving time will begin at 2 a.m. on Sunday, March 10. It will mean losing an hour of sleep and moving the clocks around your house forward one hour, though your cell phone will ...
Permanent standard time is considered by circadian health researchers and safety experts worldwide to be the best option for health, safety, schools, and economy, including the American Academy of Sleep Medicine, National Sleep Foundation, American College of Chest Physicians, National Safety Council, American College of Occupational and Environmental Medicine, Canadian Sleep Society, World ...
The United States National Hurricane Center's official advisories typically report AST and UTC when tracking storms in the Caribbean that threaten the U.S., which may confuse the mainland public not familiar with the time zone designation (although AST is equivalent to Eastern Daylight Time (EDT) for most of the Atlantic hurricane season). [4]