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The Indian Standard Time was adopted on 1 January 1906 during the British era with the phasing out of its precursor Madras Time (Railway Time), [2] and after Independence in 1947, the Union government established IST as the official time for the whole country, although Kolkata and Mumbai retained their own local time (known as Calcutta Time and Bombay Time) until 1948 and 1955, respectively. [3]
GST: South Georgia and the South Sandwich Islands Time: UTC−02:00: GST: Gulf Standard Time: UTC+04:00: GYT: Guyana Time: UTC−04:00: HDT: Hawaii–Aleutian Daylight Time: UTC−09:00: HAEC: Heure Avancée d'Europe Centrale French-language name for CEST UTC+02:00: HST: Hawaii–Aleutian Standard Time: UTC−10:00: HKT: Hong Kong Time: UTC+08: ...
India uses only one time zone (even though it spans two geographical time zones) across the whole nation and all its territories, called Indian Standard Time (IST), which equates to UTC+05:30, i.e. five and a half hours ahead of Coordinated Universal Time (UTC). India does not currently observe daylight saving time (DST or summer 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.
UTC−10:00 – Hawaii, most of the Aleutian Islands, and Johnston Atoll UTC−09:00 ( AKT ) – Most of the state of Alaska UTC−08:00 ( PT ) – Pacific Time zone : the Pacific coast states, the Idaho Panhandle and most of Nevada and Oregon
This change was made permanent from 1946 by the Standard Time Act 1945, [9] at which the time at the 180°E meridian was made the basis for New Zealand Time. [10] NZST remained half an hour ahead of NZMT, and the Chatham Islands 45 minutes ahead of NZST. The use of atomic clocks, which can measure time extremely accurately, led to the adoption ...
Calcutta Time was one of the two official time zones established in British India in 1884. It was established during the International Meridian Conference held at Washington, D.C. in the United States. It was decided that India had two time zones: Calcutta (now Kolkata) would use the 90th meridian east and Bombay (now Mumbai) the 75th meridian ...
Standard format: 1- or 2-digit day, the spelled-out month, and 4-digit year (e.g. 4 February 2023) Civilian format: spelled out month, 1-or 2-digit day, a comma, and the 4-digit year (e.g. February 4, 2023). [12] Date Time Group format, used most often in operation orders. This format uses DDHHMMZMONYY, with DD being the two-digit day, HHMM ...