Jet lag is a mismatch between your body clock and the local time wherever you are. If you travel has time zone complexities or possible impacts on your health or comfort, consult an expert as you plan it. If starting the reverse course by midday, you may well arrive but a few clock hours more or less on the same calendar day.west coast to Japan or Hong Kong in late evening can land you there in the morning two calendar days later. Starting a 12–15 hour flight from the U.S.Crossing the International Date Line can cause confusion about on what date you'll arrive, e.g.,:.You may miss important obligations simply by not understanding what will be the correct local time as you travel.Your "body clock" may experience some stress as you "tell" it to meet business appointments, tours and other obligations perhaps a few or several hours different from the hours you normally rest.You need to take some care when planning trips that span time zones, e.g.,: (Note: The total span of time zones covers more than 24 hours because the Date Line jogs westward and eastward to keep certain national island groupings on the same calendar day, although they are not within a single time zone.)
#London gmt time zone full
Crossing the Date Line going eastward, clocks are turned back a full 24 hours, and vice versa in the opposite direction. UTC+4) zones west of UTC and east of the Date Line are specified by the number of hours behind UTC (e.g. Time zones east of UTC and west of the International Date Line are specified by the number of hours ahead of UTC (e.g. It comes from the nautical system in which each time zone was assigned a letter. The "Z" is for "zero", and "Zulu" is the two-way radio pronunciation of "Z". UTC is also sometimes called Z or Zulu time. UTC used to be called GMT (Greenwich Mean Time), after the Royal Observatory located in the Greenwich area of London. And exactly on the opposite side of the globe is Greenwich, so consequently the time UTC+0 was set.This is a list of countries, regions, and territories grouped by time zone.Īlthough many time zones have descriptive names used by people in them, they are least ambiguously identified by their relationship to UTC (Universal Time, Co-ordinated). This line was found in the Pacific Ocean between Russia and Alaska. Even if, Great Britain was a famous seafaring nation and well-known for its navigation, it is however only coincidence that Greenwich of all places is the zero point of the today's time calculation.įor the dateline, a north-south line on the globe was searched for, which was as far away as possible from any civilization. Greenwich is a suburb of London through which the prime meridian passes. Only in 1972 it was renamed into the Coordinated Universal Time (UTC). Establishment of Greenwich Mean Time Since the late 19th century, Greenwich Mean Time has been the universal time. From 1968 to 1971, the country even kept UTC+1 time all year round. Several experiments with the extension of summer time followed. The longer daylight hours in the evening allow for more outdoor activities and should reduce energy consumption. the time was changed 2 hours forward in summer. During the Second World War, there was even a "British Double Summer Time" in Great Britain, i.e. Daylight saving time was first introduced in 1916, but at that time there was initially a changeover in four steps of 20 minutes each. It goes back to GMT standard time on the last Sunday in October. Daylight saving time in the United Kingdom The changeover to British Summer Time occurs, as it does throughout Europe, on the last Sunday in March, when clocks are advanced by one hour, making evenings longer and taking advantage of natural daylight. These times also apply in the United Kingdom dependent territories of Jersey, Guernsey and the Isle of Man, but not in Gibraltar, where Central European Time is observed due to relations with Spain. However, during the summer months, people switch to British Summer Time (BST), which corresponds to UTC+1:00. GMT corresponds to Coordinated Universal Time (UTC+0:00), which is the worldwide reference for timekeeping. Throughout the United Kingdom, a single time zone, Greenwich Mean Time (GMT), applies during the winter months. Only 1 nationwide time zone Standard time:
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