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The UTC offsets are based on the current or upcoming database rules. This table does not attempt to document any of the historical data which resides in the database. In Ireland , what Irish law designates as "standard time" is observed during the summer, with clocks turned one hour ahead of UTC.
[a] Using telescopes, GMT was calibrated to the mean solar time at the prime meridian through the Royal Observatory, Greenwich. Chronometers or telegraphy were used to synchronize these clocks. [4] Standard time zones of the world. The number at the bottom of each zone specifies the number of hours to add to UTC to convert it to the local time.
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.
This is an accepted version of this page This is the latest accepted revision, reviewed on 4 February 2025. Primary time standard "UTC" redirects here. For the time zone between UTC−1 and UTC+1, see UTC+00:00. For other uses, see UTC (disambiguation). It has been suggested that UTC offset be merged into this article. (Discuss) Proposed since December 2024. Current time zones Coordinated ...
2: UTC+10:00 – States of Chuuk and Yap UTC+11:00 – States of Kosrae and Pohnpei: Time in the Federated States of Micronesia: Kingdom of the Netherlands: 2: UTC−04:00 – Caribbean municipalities and constituent countries UTC+01:00 – Main territory of the Netherlands: Mongolia: 2: UTC+07:00 – Provinces of Khovd, Uvs and Bayan-Ölgii
Central European Time : Central European Summer Time : Yellow: Eastern European Time / Kaliningrad Time : Ochre: Eastern European Time : Eastern European Summer Time : Green: Moscow Time / Turkey Time : Turquoise: Armenia Time / Azerbaijan Time / Georgia Time / Samara Time
Before 1891, each town and city in Metropolitan France had its own time based on local solar time.In 1891, to avoid complications with railway timetables, time was unified in Metropolitan France and based on the solar time at the Paris Observatory — the Paris meridian being approximately 2°20′ east of the Greenwich meridian, Paris mean solar time was 9 minutes 21 seconds ahead of ...
In Ireland, winter time begins at 02:00 IST on the last Sunday in October (changing the clocks to 01:00 GMT), and ends at 01:00 GMT on the last Sunday in March (changing to 02:00 IST). [ 3 ] [ 4 ] The following table lists recent past and near-future starting and ending dates of Irish Standard Time or Irish Summer Time (use of DST beyond 2019 ...