UT is used as a basis for calculating time throughout most of the world. UT is also called Greenwich Time, Greenwich Mean Time, Zulu Time. It is the time along the prime meridian (0 longitude) that runs through the Greenwich Observatory outside of London, UK, where the current system originated.
UT is tied to the rotation of the Earth in respect to the fictitious “mean Sun,” which gives equal 24-hour days throughout the year. Greenwich Mean Time (GMT) was measured from Greenwich Mean at midday until 1925, when the reference point was changed from noon to midnight and the name changed to “Universal Time.”
Below is an easy chart for you to use to adjust show you the time difference fro UT time to your Time Zone.
| LOCATION TIME ZONE |
STANDARD TIME |
DAYLIGHT SAVING TIME |
| International Date Line East (IDLE) | +12 hours | |
| New Zealand Standard Time (NZST) | +12 hours | |
| New Zealand Time (NZT) | +10 hours | |
| Guam Standard Time (GST) | +10 hours | |
| Australian Eastern Standard Time (AEST) (AEDT) |
+10 hours | +11 hours |
| Australian Central Standard Time (ACST) (ACDT) |
+9.5 hours | +10.5 hours |
| Japan Standard Time (JST) | +9 hours | |
| China Coast Time (CCT) | +8 hours | |
| Australian Western Standard Time (AWST) | +8 hours | |
| India Standard Time (IST) | +5.5 hours | |
| Russian Zone 3 | +4 hours | |
| Baghdad Time (BT) | +3 hours | |
| Russian Zone 2 | +3 hours | |
| Moscow Time(MSK) (MSD) |
+3 hours | +4 hours |
| Eastern European Time (EET) (EEST) |
+2 hours | +3 hours |
| Russian Zone 1 | +2 hours | |
| Central Europe Summer Time (CEST) | +2 hours | |
| Central European Time (CET) | +1 hour | |
| Middle European Time (MET) | +1 hour | |
| Swedish Winter Time (SWT) | 0 hours | |
| Greenwich Mean Time (GMT) | 0 hours | |
| Universal Time (UT) | 0 hours | |
| Western European Time (WET) (WEST) |
0 hours | +1 hour |
| British Summer Time (BST) | +1 hour | |
| Irish Summer Time (IST) | +1 hour | |
| West African Time (WAT) | -1 hour | |
| Newfoundland Standard Time (NST) (NDT) |
-3.5 hours | -2.5 hours |
| Atlantic Standard Time (AST) (ADT) |
-4 hours | -3 hours |
| Eastern Standard Time (EST) (EDT) |
-5 hours | -4 hours |
| Central Standard Time (CST) (CDT) |
-6 hours | -5 hours |
| Mountain Standard Time (MST) (MDT) |
-7 hours | -6 hours |
| Pacific Standard Time (PST) (PDT) |
-8 hours | -7 hours |
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