- Coordinated Universal Time (UTC) is the international time standard. It is the current term for what was commonly referred to as GreenwichMeridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England, which lies on the zero longitudinal meridian. Universal time is based on a 24 hour clock, therefore, afternoon hours such as 4 pm UTC are expressed as16:00 UTC (sixteen hours, zero minutes).
- Coordinated Universal Time (UTC), international basis of civil and scientific time, which was introduced on January 1, 1960. The unit of UTC is the atomic second, and UTC is widely broadcast by radio signals. These signals ultimately furnish the basis for the setting of all public and private clocks.
What is UTC or GMT Time?
Weather observations around the world (including surface, radar, and other observations) are always taken with respect to a standard time. By convention, the world's weather communities use a twenty four hour clock, similar to 'military' time based on the 0° longitude meridian, also known as the Greenwich meridian.
Prior to 1972, this time was called Greenwich Mean Time (GMT) but is now referred to as Coordinated Universal Time orUniversal Time Coordinated (UTC). It is a coordinated time scale, maintained by the Bureau International des Poids etMesures (BIPM). It is also known as 'Z time' or 'Zulu Time'.
Universal Time: Scale:00:0000:0500:1000:1500:2000:25. Is local time not Right? Input the time zone below to convert: » UTC to Worldwide Timezone Converters. Universal Time Offset: UTC +0.:: Local Time:: Search Time Zone Converters. Moon Phases Rise Set Time Worldwide.
To obtain your local time here in the United States, you need to subtract a certain number of hours from UTC dependingon how many time zones you are away from Greenwich (England). The table below shows the standard difference from UTC time to local time.
The switch to daylight saving time does not affect UTC. It refers to time on the zero or Greenwich meridian, which is notadjusted to reflect changes either to or from Daylight Saving Time.
However, you need to know what happens during daylight saving time in the United States. In short, the local time is advanced one hour during daylight saving time. As an example, the Eastern Time zone difference from UTC is -4 hours during daylight saving time rather than -5 hours as it is during standard time.
|Standard Time||Daylight Saving|
|AST - Atlantic, AK - Alaska time, HI - Hawaii time, *The previous day, %The next day|
Note: Credit given to NWS Southern Region Headquarters for the information above.
Utc Coordinated Universal Time Country
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Coordinated Universal Time (UTC) is the international time standard.It is the current term for what was commonly referred to as GreenwichMeridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England, which lies on the zero longitudinal meridian. Universal time is based on a 24 hour clock, therefore, afternoon hours such as 4 pm UTC are expressed as16:00 UTC (sixteen hours, zero minutes).
Since a day is 24 hours long, the world may be split into 15 degree wide longitudinal bands (360 degrees/24 hours). Each band represents one hour. As an example, Huntsville Alabama is located at approximately 90 degrees west longitude, hence, local time lags UTC time by 6 hours (90/15, assuming Central Standard Time, 5 hours in Central Daylight Time). So, if the universal time is 14:30 UTC, United States Central Standard Time would be 8:30 am CST.
Illustrated below is a map which indicates the 15 degree wide longitude bands. Referring to the Huntsville example, count the lines west of the 0 meridian until you get near Alabama. There are 6 lines, hence 6 hours difference. Counting the bands may not give you an exact time for your location, as countries impose their own time regions due to geographic borders, but it should be close. Subtract time in west longitudes (negative values), add time in east longitudes (positive values).