India standard time

India does not observe daylight saving time or other seasonal adjustments, india standard time. The Indian Standard Time was adopted on 1 January during the British era with the phasing out of its precursor Madras Time Railway Time[2] and after Independence inthe 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 andrespectively. Inhabitants of the northeastern states have to india standard time their clocks with the early sunrise to avoid the extra consumption of energy after daylight hours.

India does not currently observe daylight saving time DST or summer time. The official time signal is given by the Time and Frequency Standards Laboratory. The date and time notation in India shows some peculiarities. The 4th century CE astronomical treatise Surya Siddhanta postulated a spherical earth. The day used by ancient Indian astronomers began at sunrise at the prime meridian of Ujjain, [2] and was divided into smaller time units in the following manner: [3]. For most of India's history , ruling kingdoms kept their own local time, typically using the Hindu calendar in both lunar and solar units. In Madras Time was set up by John Goldingham [7] and this was later used widely by the railways in India.

India standard time

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Department of Science and Technology. Retrieved 10 May

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India standard time

India has only one time zone. India is a large country that stretches almost kilometers miles from west to east. If the country were to base its time zones on mean solar time , it would have three time zones, but since it only has one, the Sun rises almost 90 minutes earlier in Dong in the far east than in Guar Mota in the west. Tea Garden Time is an informal time zone used in India's northeastern state Assam. In this part of the country, sunrise can come as early as 4 am IST in the morning and sunset at 4 pm IST in the afternoon. There are a few drawbacks of keeping the one time zone.

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Archived from the original on 19 May Retrieved Retrieved 19 April BBC News. Time zones used in India. Retrieved 1 January Category Asia portal. Indian Standard Time. After independence in , the Indian government established IST as the official time for the whole country, although Mumbai and Kolkata retained their own local time for a few more years. Department of Science and Technology. April India does not currently observe daylight saving time DST or summer time. Official time signals are generated by the Time and Frequency Standards Laboratory at the National Physical Laboratory in New Delhi , for both commercial and official use.

India does not observe daylight saving time or other seasonal adjustments. The Indian Standard Time was adopted on 1 January during the British era with the phasing out of its precursor Madras Time Railway Time , [2] and after Independence in , 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 and , respectively.

Article Talk. For most of India's history , ruling kingdoms kept their own local time, typically using the Hindu calendar in both lunar and solar units. Retrieved 10 May Main article: Time in India. Category Asia portal. The Times of India Blog. April Hidden categories: Articles with short description Short description matches Wikidata Use dmy dates from August Use Indian English from August All Wikipedia articles written in Indian English Wikipedia articles in need of updating from February All Wikipedia articles in need of updating. Time zones used in India. India does not observe daylight saving time or other seasonal adjustments.