Indian Standard Time

Indian Standard Time (IST) ek time hae jiske India aur Sri Lanka me kaam me lawajaae hae, aur jon ki UTC se paanch aur aadha ghanta aage hae. 1 January 1906 ^[1] British India me Indian Standard Time kaam me lae ke suruu karaa gais.

IST in relation with the bordering nations

Pahile kaam me lae ke timezones

Time Zone	UTC	Period	Purpose
Bombay Time	UTC+04:51	1884–1955	Official
Calcutta Time	UTC+05:53:20	1884–1948	Official
Madras Time	UTC+05:21:14	1802–1906	Railways
Port Blair mean time	UTC+06:10:37	19th century–1906	Local