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The World Meteorological Organization (WMO) has adopted Coordinated Universal Time (abbreviated UTC) as the standard time zone for use in reporting of all meteorological data. Based on the 0° longitude (Greenwich) meridian, it is determined using highly precise atomic clocks. GMT (Greenwich Mean Time) is an obsolete term. For practical purposes it is used today interchangeably with UTC.
To convert UTC to
    Eastern Standard Time subtract 5 hours
    Eastern Daylight Time subtract 4 hours
    Atlantic Standard Time subtract 4 hours
    Atlantic Daylight Time subtract 3 hours
The clocks below, linked to the U.S. Naval Observatory show the actual Eastern and UTC times.
Note: These clocks only work in Mozilla browsers. For a clock display supported by MS Internet Explorer click here...
Eastern
UTC
Times given in UTC and UT are usually in terms of a 24-hour clock. 13:20 (1320) would be 1:20 p.m. Sometimes a Z (for Zulu) is appended to a time to indicate UT, as in 1320Z.
12/24 hour clock converter:
24 Hour Time
12 Hour Time
note: this clock uses your computer's time and constantly updates. It, therefore, may not agree with the clocks above.

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