UTC offset
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The UTC offset is the difference in hours and minutes between Coordinated Universal Time (UTC) and the standard time at a particular place.[1] This difference is expressed with respect to UTC and is generally shown in the format ±[hh]:[mm], ±[hh][mm], or ±[hh]. So if the time being described is two hours ahead of UTC (such as in Kigali, Rwanda [approximately 30° E]), the UTC offset would be "+02:00", "+0200", or simply "+02".
By convention, every inhabited place in the world has a UTC offset that is a multiple of 15 minutes but the majority of offsets are stated in whole hours. There are many cases where the national standard time uses a UTC offset that is not defined solely by longitude.Template:Efn
Time zones and time offsets
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A time zone is a geographical region in which residents observe the same standard time. Although nominally a new time zone is established every 15 degrees east or west of the prime meridian (meaning a one-hour change in the time), in practice local geographical or political considerations may vary its application. The most extreme example of this is time in China, which applies a single standard time offset of UTC+08:00 (eight hours ahead of Coordinated Universal Time), even though China spans five geographical time zones.
The UTC offset (or time offset) is an amount of time added to Coordinated Universal Time (UTC) time to specify the time at a given location.
Daylight saving time
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Illustrative examples
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| Location | Longitude | UTC offset | When UTC time is 12:00, local time is: |
When local time is 12:00, UTC time is: |
|---|---|---|---|---|
| Accra, Ghana | 0° 12′ W | UTC+00:00 | 12:00 | 12:00 |
| Mogadishu, Somalia | 45° 20′ E | UTC+03:00 | 15:00 | 09:00 |
| Dhaka, Bangladesh | 90° 23′ E | UTC+06:00 | 18:00 | 06:00 |
| Koror, Palau | 134° 29′ E | UTC+09:00 | 21:00 | 03:00 |
| Suva, Fiji | 178° 27′ E | UTC+12:00 | 00:00 | 00:00 |
| Honolulu, United States | 157° 51′ W | UTC−10:00 | 02:00 | 22:00 |
| Guatemala City, Guatemala | 90° 32′ W | UTC−06:00 | 06:00 | 18:00 |
| Brasília, Brazil | 47° 53′ W | UTC−03:00 | 09:00 | 15:00 |
See also
- ISO 8601 – international standard for representing dates and times.
Notes
References
External links
Template:Time Topics Template:Time measurement and standards Template:Timezones
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