![]() ![]() ![]() The United States uses nine standard time zones. A new federal law took effect in March 2007 which extends Daylight Saving Time by four weeks. Eastern Standard Time (EST) becomes Eastern Daylight Time (EDT), and so forth. The names in each time zone change along with Daylight Saving Time. On the first Sunday in November areas on Daylight Saving Time return to Standard Time at 2:00 a.m. local time on the second Sunday in March. In the United States Daylight Saving Time begins at 2:00 a.m. Virgin Islands and American Samoa do not observe Daylight Saving Time. In places not observing Daylight Saving Time the local UTC or GMT offset will remain the same year round. As a result, their UTC or GMT offset would change from UTC -5h or GMT - 5h to UTC -4h or GMT - 4h. In areas of the United States that observe Daylight Saving Time local residents will move their clocks ahead one hour when Daylight Saving Time begins. Coordinated Universal Time is also known Zulu Time or Z time. The usage of UTC and GMT is based upon a twenty four hour clock, similar to military time, and is based upon the 0 degrees longitude meridian, referred to as the Greenwich meridian in Greenwich, England.Ĭoordinated Universal Time is based on cesium-beam atomic clocks, with leap seconds added to match earth-motion time, where as Greenwich Mean Time is based upon the Earth's rotation and celestial measurements. UTC+5h or GMT +5h would refer to that time zone being five hours ahead of UTC of GMT and so forth for the other time zones. In this example the (-5h) refers to that time zone being five hours behind UTC or GMT and so forth for the other time zones. You will often see time zones represented similar to UTC - 5h or GMT - 5h. Coordinated Universal Time replaced the use of Greenwich Mean Time (GMT) in 1972. ![]() Australia is in the GMT+7 and the countries in Southeast Asia that are in GMT+7 include Cambodia, Indonesia, Laos, Thailand, and Vietnam.Coordinated Universal Time (UTC) is used as the official world reference for time. It is the Western part of Mongolia that has the GMT +7 time zone, in Hovd, Zavkhan, Uvs, Bayan-Olgii, and Govi-Altai. Russia is a country with three different time zones, but the GMT +7 time zone regions of Russia include the Siberian Federal District areas that include: ![]() The countries that are in the GMT +7 time zone are as follows: Sometimes there are regions that fall within a meridian line but is in a completely different time zone. Official time zones do not always mirror the meridian lines, but GMT +7 can be geographical. UTC is used frequently, and GMT is used by the United Kingdom, the BBC World Service, Middle East Broadcasting Centre, and the Royal Navy. Outside of the GMT time zone, GMT is a day that once started at noon, but now, starts at midnight like every other time zone. This typically occurs just moments before noon GMT. GMT is calculated at this point of the world due to the Earth’s tilt and how the Sun reaches its highest point in Greenwich. The terms are often used interchangeably. UTC time is Coordinated Universal Time but can be different from GMT by approximately nine seconds. So, at noon in Greenwich, the time in GMT 7 countries would be 7:00 p.m. Greenwich Mean Time +7 would be the time in Greenwich and London, plus seven hours. It is the name of a time zone, like E.S.T. It doesn’t calculate a specified time but is a standard of measurement like inches or yards. Greenwich Mean Time is calculated by the meridian line in Greenwich, London, and starts at midnight. GMT has actually been replaced by Coordinated Universal Time (UTC), but remains the more commonly known of the two terms. GMT is an acronym for Greenwich Mean Time. Some of those countries have multiple regions and time zones but have areas that include the GMT +7 time zone, like the countries in North America have multiple time zones. There are several countries that are GMT 7 countries, or countries in the GMT +7 time zone. ![]()
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