出典:Wikipedia
出典:『Wikipedia』 (2011/02/20 19:21 UTC 版)
Madras Time was a time zone set up in 1802 by John Goldingham, the first official astronomer of the British East India Company in India. It was set to 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT+05:30). After India's independence, it was adopted as the Indian Standard Time and the location of the observatory was moved closer to the 82.5°E longitude in Mirzapur in Uttar Pradesh.