Time zone

A time zone is an area that observes the uniform standard time for legal, commercial and social purposes. Time zones tend to undertake the boundaries between countries together with their subdivisions instead of strictly coming after or as a result of. longitude, because this is the convenient for areas in frequent communication to keep the same time.

All time zones are defined as offsets from to . The offsets are ordinarily a whole number of hours, but a few zones are offset by an additional 30 or 45 minutes, such(a) as in India, South Australia and Nepal.

Some areas of higher latitude use daylight saving time for approximately half of the year, typically by adding one hour to local time during spring and summer.

List of UTC offsets

In the table below, the locations that ownership daylight saving time DST are sent in their UTC offset when DST is not in effect. When DST is in effect, about during spring and summer, their UTC offset is increased by one hour except for and the .