A report on Calcutta Time

One of the two time zones established in British India in 1884.

- Calcutta Time

2 related topics with Alpha

Overall

Location of Mirzapur (near Allahabad) and the 82.5° E longitude that is used as the reference longitude for IST

Indian Standard Time

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Time zone observed throughout India, with a time offset of UTC+05:30.

Time zone observed throughout India, with a time offset of UTC+05:30.

Location of Mirzapur (near Allahabad) and the 82.5° E longitude that is used as the reference longitude for IST

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.

Madras Time

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Time zone established in 1802 by John Goldingham, the first official astronomer of the British East India Company in India when he determined the longitude of Madras as 5 hours, 21 minutes and 14 seconds ahead of Greenwich Mean Time.

Time zone established in 1802 by John Goldingham, the first official astronomer of the British East India Company in India when he determined the longitude of Madras as 5 hours, 21 minutes and 14 seconds ahead of Greenwich Mean Time.

It has been described as 8 minutes and 46 seconds from UTC+05:30 and 32 minutes and 6 seconds behind Calcutta Time which puts it at (UTC+05:21:14).