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The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2025a of the tz database. [2]
Time zone changes in Tibet are undocumented, but Beijing Time was in use until at least the mid-1950s. Between 1969 and 1986, the time zone was switched repeatedly between Xinjiang Time and Beijing Time. [3] Daylight saving time was observed from 1945 to 1948, and from 1986 to 1991. [3]
Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...
The first time zone plan was proposed by the Central Observatory (now Beijing Ancient Observatory) of the Beiyang government in Peking in 1918. The proposal divided the country into five time zones : Kunlun ( UTC+05:30 ), Sinkiang-Tibet ( UTC+06:00 ), Kansu-Szechwan ( UTC+07:00 ), Changhua ( UTC+08:00 ) and Chinghai ( UTC+08:30 ).
The North American Central Time Zone (CT) is a time zone in parts of Canada, the United States, Mexico, Central America, and a few Caribbean islands. [1]In parts of that zone (20 states in the US, three provinces or territories in Canada, and several border municipalities in Mexico), the Central Time Zone is affected by two time designations yearly: Central Standard Time (CST) is observed from ...
Xinjiang Time (Chinese: 新疆时间; pinyin: Xīnjiāng shíjiān), also known as Ürümqi Time (Chinese: 乌鲁木齐时间; pinyin: Wūlǔmùqí Shíjiān), is a time standard used in Xinjiang, China. It is used alongside Beijing Time, which is widely observed by the rest of the country. The time offset is UTC+06:00, which is two hours ...
If present, a dagger (†) indicates the usage of a nautical time zone letter outside of the standard geographic definition of that time zone. Some zones that are north/south of each other in the mid-Pacific differ by 24 hours in time – they have the same time of day but dates that are one day apart. The two extreme time zones on Earth (both ...
In communications messages, a date-time group (DTG) is a set of characters, usually in a prescribed format, used to express the year, the month, the day of the month, the hour of the day, the minute of the hour, and the time zone, if different from Coordinated Universal Time (UTC).