Daylight Saving Time – DST
Daylight Saving Time aka Daylight Savings Time, DST or Summer Time. Clocks go forward 1 hour in the spring and back in the fall to make better use of natural daylight. more
Daylight Saving Time aka Daylight Savings Time, DST or Summer Time. Clocks go forward 1 hour in the spring and back in the fall to make better use of natural daylight. more
Coordinated Universal Time (UTC) is the basis for civil time today. This 24-hour time standard is kept using highly precise atomic clocks combined with the Earth's rotation. more
A Time Zone refers to any of 24 regions loosely divided by longitude, where the same standard time is kept. more
The International Date Line (IDL) is an imaginary line of longitude on the Earth’s surface located at about 180 degrees east (or west) of the Greenwich Meridian. more
The UK is not on Greenwich Mean Time (GMT) all year. During Daylight Saving Time the correct time zone is British Summer Time (BST). more
Greenwich Mean Time (GMT) is often interchanged or confused with Coordinated Universal Time (UTC). But GMT is a time zone and UTC is a time standard. more
Daylight Saving Time or summer time transition, what time does DST start or finish? more
DST has become a political issue, while others debate whether setting the clocks one hour ahead in the spring has the intended effect of conserving energy or reducing road accidents. more
International Atomic Time (TAI) is one of the main components of Coordinated Universal Time (UTC), the time scale used to determine local times around the world. more
Leap seconds have been added to atomic clocks since 1972. Why are they needed and why the Earth is slowing down? more
Every now and then a leap second is added to Coordinated Universal Time (UTC) in order to synchronize atomic clocks with the Earth's ever slowing rotation. more
The abbreviation for Coordinated Universal Time is UTC. Why is it not abbreviated as “CUT” or “TUC”? more
Technically, both the South Pole and the North Pole are at all time zones at the same time. more
Organizations and individuals have for many years argued about abolishing leap seconds for good. more
Daylight Saving Time (DST) was first used in Germany in 1916. more
Useful time and date facts that will make you the star at a party! more
You can help name the new official Time Zone on Mars by voting during the month of April. more
What does AM and PM mean? Before noon, and after noon of course. more
Astronomers use other measures of time, such as Terrestrial Time (TT), which is 32.184 seconds ahead of International Atomic Time (TAI). more
Why doesn't the year's earliest sunset not occur on the Winter Solstice, even though it is the shortest day of the year in terms of daylight? more
How to tell time at night when you don't have a watch or a smartphone readily available and are in the Northern Hemisphere. more
Summer Time is often used to describe Daylight Saving Time (DST), especially the United Kingdom. Winter Time instead of Standard Time is also a common variation. more
Cartographers and geographers divide the Earth into longitudes and latitudes in order to locate points on the globe. more
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