GMT Conversion - A Quick Reference...
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If you are located in the United States, and want to convert from GMT (Greenwich Mean Time)
or UTC (Universal Time Coordinate) to your local time then use the following table.
From the last Sunday in October through the last Saturday in March standard time is noted as Central Standard Time (CST),
(EST), (MST) or (PST). To convert GMT to local time, simply subtract 6 hours off the GMT to get CST, and subtract 5 hours off the GMT to get CDT. Your answer will be in a form of a 24 hour clock which is equivalent to what the military uses. For example, if you want to convert 20:00 GMT which is often written as 20Z to CST, you would subtract 6 hours off and end up with 14:00 hours CST. Since this is in the form of a 24 hour clock you would subtract 12 hours to get 2:00 PM CST. |
| Time Zone |
EDT | EST or CDT |
CST or MDT |
MST or PDT |
PST |
|---|---|---|---|---|---|
| Offset | UTC-4 | UTC-5 | UTC-6 | UTC-7 | UTC-8 |
North American Time Zones and GMT
To convert UTC to local time, you have to add or subtract hours from it. For persons west of the zero meridian to the international date line (which includes all of North America), hours are subtracted from UTC to convert to local time. Below is a table showing the number of hours to subtract from local time zones in North America in order to convert UTC to local time. Not all states use daylight savings time in the summer.
The Time Zones across North America and Pacific from East to West are:
Standard Daylight Savings
Time Time
Atlantic
Eastern EST EDT
Central CST CDT
Mountain MST MDT
Pacific PST PDT
Alaska
Hawaii
Standard time:
GMT ATL EST CST MST PST ALA HAW
difference -4 -5 -6 -7 -8 -9 -10
00 8P* 7P* 6P* 5P* 4P* 3P* 2P*
01 9P* 8P* 7P* 6P* 5P* 4P* 3P*
02 10P* 9P* 8P* 7P* 6P* 5P* 4P*
03 11P* 10P* 9P* 8P* 7P* 6P* 5P*
04 12A 11P* 10P* 9P* 8P* 7P* 6P*
05 1A 12A 11P* 10P* 9P* 8P* 7P*
06 2A 1A 12A 11P* 10P* 9P* 8P*
07 3A 2A 1A 12A 11P* 10P* 9P*
08 4A 3A 2A 1A 12A 11P* 10P*
09 5A 4A 3A 2A 1A 12A 11P*
10 6A 5A 4A 3A 2A 1A 12A
11 7A 6A 5A 4A 3A 2A 1A
12 8A 7A 6A 5A 4A 3A 2A
13 9A 8A 7A 6A 5A 4A 3A
14 10A 9A 8A 7A 6A 5A 4A
15 11A 10A 9A 8A 7A 6A 5A
16 12P 11A 10A 9A 8A 7A 6A
17 1P 12P 11A 10A 9A 8A 7A
18 2P 1P 12P 11A 10A 9A 8A
19 3P 2P 1P 12P 11A 10A 9A
20 4P 3P 2P 1P 12P 11A 10A
21 5P 4P 3P 2P 1P 12P 11A
22 6P 5P 4P 3P 2P 1P 12P
23 7P 6P 5P 4P 3P 2P 1P
* represents previous day
(i.e. 03 hours 23 January 93 is 8PM-MST 22 January)
Summertime (Daylight savings time) for those states that observe daylight
savings time. For those that do not, use the standard time table all year:
GMT EDT CDT MDT PDT
difference -4 -5 -6 -7
00 8P* 7P* 6P* 5P*
01 9P* 8P* 7P* 6P*
02 10P* 9P* 8P* 7P*
03 11P* 10P* 9P* 8P*
04 12A 11P* 10P* 9P*
05 1A 12A 11P* 10P*
06 2A 1A 12A 11P*
07 3A 2A 1A 12A
08 4A 3A 2A 1A
09 5A 4A 3A 2A
10 6A 5A 4A 3A
11 7A 6A 5A 4A
12 8A 7A 6A 5A
13 9A 8A 7A 6A
14 10A 9A 8A 7A
15 11A 10A 9A 8A
16 12P 11A 10A 9A
17 1P 12P 11A 10A
18 2P 1P 12P 11A
19 3P 2P 1P 12P
20 4P 3P 2P 1P
21 5P 4P 3P 2P
22 6P 5P 4P 3P
23 7P 6P 5P 4P
* represents previous day
(i.e. 03 hours 23 June is 9PM-MDT 22 June)
GMT Hour To Zone Conversion...
UTC uses a 24-hour system of time notation. "1:00 a.m." in UTC is expressed as 0100, pronounced "zero one hundred." Fifteen minutes after 0100 is expressed as 0115; thirty-eight minutes after 0100 is 0138 (usually pronounced "zero one thirty-eight"). The time one minute after 0159 is 0200. The time one minute after 1259 is 1300 (pronounced "thirteen hundred"). This continues until 2359. One minute later is 0000 ("zero hundred"), and the start of a new UTC day.
| UTC GMT | EDT | EST CDT | CST MDT | MST PDT | PST |
| 0000 | 8 PM | 7 PM | 6 PM | 5 PM | 4 PM |
| 0100 | 9 PM | 8 PM | 7 PM | 6 PM | 5 PM |
| 0200 | 10 PM | 9 PM | 8 PM | 7 PM | 6 PM |
| 0300 | 11 PM | 10 PM | 9 PM | 8 PM | 7 PM |
| 0400 | Midnight | 11 PM | 10 PM | 9 PM | 8 PM |
| 0500 | 1 AM | Midnight | 11 PM | 10 PM | 9 PM |
| 0600 | 2 AM | 1 AM | Midnight | 11 PM | 10 PM |
| 0700 | 3 AM | 2 AM | 1 AM | Midnight | 11 PM |
| 0800 | 4 AM | 3 AM | 2 AM | 1 AM | Midnight |
| 0900 | 5 AM | 4 AM | 3 AM | 2 AM | 1 AM |
| 1000 | 6 AM | 5 AM | 4 AM | 3 AM | 2 AM |
| 1100 | 7 AM | 6 AM | 5 AM | 4 AM | 3 AM |
| 1200 | 8 AM | 7 AM | 6 AM | 5 AM | 4 AM |
| 1300 | 9 AM | 8 AM | 7 AM | 6 AM | 5 AM |
| 1400 | 10 AM | 9 AM | 8 AM | 7 AM | 6 AM |
| 1500 | 11 AM | 10 AM | 9 AM | 8 AM | 7 AM |
| 1600 | Noon | 11 AM | 10 AM | 9 AM | 8 AM |
| 1700 | 1 PM | Noon | 11 AM | 10 AM | 9 AM |
| 1800 | 2 PM | 1 PM | Noon | 11 AM | 10 AM |
| 1900 | 3 PM | 2 PM | 1 PM | Noon | 11 AM |
| 2000 | 4 PM | 3 PM | 2 PM | 1 PM | Noon |
| 2100 | 5 PM | 4 PM | 3 PM | 2 PM | 1 PM |
| 2200 | 6 PM | 5 PM | 4 PM | 3 PM | 2 PM |
| 2300 | 7 PM | 6 PM | 5 PM | 4 PM | 3 PM |
World GMT Table...
GMT time difference for various locations through out the world.
| Zone | City or Area Zone Crosses |
| GMT-12 | Eniwetok |
| GMT-11 | Samoa |
| GMT-10 | Hawaii |
| GMT-9 | Alaska |
| GMT-8 | PST, Pacific US |
| GMT-7 | MST, Mountain US |
| GMT-6 | CST, Central US |
| GMT-5 | EST, Eastern US |
| GMT-4 | Atlantic, Canada |
| GMT-3 | Brazil, Buenos Aries |
| GMT-2 | Mid-Atlantic |
| GMT-1 | Cape Verdes |
| GMT | Greenwich Mean Time, Dublin |
| GMT+1 | Berlin, Rome |
| GMT+2 | Israel, Cairo |
| GMT+3 | Moscow, Kuwait |
| GMT+4 | Abu Dhabi, Muscat |
| GMT+5 | Islamabad, Karachi |
| GMT+6 | Almaty, Dhaka |
| GMT+7 | Bangkok, Jakarta |
| GMT+8 | Hong Kong, Beijing |
| GMT+9 | Tokyo, Osaka |
| GMT+10 | Sydney, Melbourne, Guam |
| GMT+11 | Magadan, Soloman Is. |
| GMT+12 | Fiji, Wellington, Auckland |
Copyright © 2002 By Keith Cooley - eMail:krcool@hiwaay.net - Return To Keith's Moon Page