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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]
The one-hour time change meant that many daytime events could be broadcast live from South Korea when it was prime time on the U.S. east coast. [4] North Korea also uses Korea Standard Time. From August 2015 to May 2018, North Korea changed its time zone to GMT+08:30, a time zone known as Pyongyang Standard Time, [9] [10] but the change was ...
This is a list representing time zones by country. Countries are ranked by total number of time zones on their territory. Time zones of a country include that of dependent territories (except Antarctic claims). France, including its overseas territories, has the most time zones with 12 (13 including its claim in Antarctica and all other counties).
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 ...
Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
Before modern clocks were introduced into Korea, Koreans kept time with the help of a sundial during the daytime and a water clock at night. In 1434, Jang Yeong-sil, a Joseon scientist and astronomer with other scientists, developed Korea's first sundial, Angbu Ilgu (앙부일구; 仰釜日晷) and was put into service as standard time-keeper of the kingdom and began the standard time at ...
The military time zones are a standardized, uniform set of time zones for expressing time across different regions of the world, named after the NATO phonetic alphabet. The Zulu time zone (Z) is equivalent to Coordinated Universal Time (UTC) and is often referred to as the military time zone.
From east to west, the four time zones of the contiguous United States are: Eastern Time Zone (Zone R), which comprises roughly the states on the Atlantic coast and the eastern two thirds of the Ohio Valley. Central Time Zone (Zone S), which comprises roughly the Gulf Coast, Mississippi Valley, and most of the Great Plains.