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British Summer Time (British Standard Time from Mar 1968 to Oct 1971) UTC+01:00: BTT: Bhutan Time: ... Eastern Standard Time (North America) UTC−05:00: ET (EST/EDT)
British Summer Time was first established by the Summer Time Act 1916, after a campaign by builder William Willett. His original proposal was to move the clocks forward by 80 minutes, in 20-minute weekly steps on Sundays in April and by the reverse procedure in September. [7] In 1916, BST began on 21 May and ended on 1 October. [8]
UTC−05:00 – Eastern Time zone: roughly a triangle covering all the states from the Great Lakes down to Florida and east to the Atlantic coast UTC−04:00 – Puerto Rico, the U.S. Virgin Islands UTC+10:00 – Guam and the Northern Mariana Islands UTC+12:00 (WAKT) – Wake Island: Time in the United States: Antarctica: 10
The dates of British Summer Time are the subject of the Summer Time Act 1972 (c. 6). From 1972 to 1980, the day following the third Saturday in March was the start of British Summer Time (unless that day was Easter Sunday, in which case BST began a week earlier), with the day following the fourth Saturday in October being the end of British ...
Some of zone records use 3 or 4 letter abbreviations that are tied to physical time zones, others use numeric UTC offsets. In Ireland , what Irish law designates as "standard time" is observed during the summer, with clocks turned one hour ahead of UTC.
This is a list of the UTC time offsets, showing the difference in hours and minutes from Coordinated Universal Time (UTC), from the westernmost (−12:00) to the easternmost (+14:00).
Starting in 1916, the dates for the beginning and end of BST each year were mandated by the Parliament of the United Kingdom. From 1940 to 1945, the country used British Summer Time in the winter months and British Double Summer Time, a further hour ahead of GMT, in the summer months. From 1968 to 1971, the country used BST throughout the year.
The Eastern Time Zone (ET) is a time zone encompassing part or all of 23 states in the eastern part of the United States, parts of eastern Canada, and the state of Quintana Roo in Mexico. Eastern Standard Time (EST) is five hours behind Coordinated Universal Time (UTC−05:00).