Indian Standard Time Made Simple
India Time
Tuesday, October 6, 2026
India Standard Time (IST) • UTC+5:30
Day of weekTuesday
Day of year279
Week numberWeek 41
DST statusNot observed
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referenceWhat Is the IANA Time Zone for India?The IANA time zone for India is Asia/Kolkata. It covers all of India, uses UTC+5:30, and has no daylight saving time. You need the IANA...
guidesIst bombay calcutta madras timeBefore India Standard Time (IST), Bombay, Calcutta, and Madras each kept their own local time. Learn what they were and why they changed.
guidesIst daylight saving historyIndia has never observed Daylight Saving Time nationally. Here is the full history of DST proposals and wartime experiments.
guidesIst npl atomic clocksNPL India maintains Indian Standard Time with cesium atomic clocks. Here is how they do it, and why your phone already trusts them.
basicsWhat Does IST Stand For? All Meanings ExplainedIST stands for India Standard Time, Irish Standard Time, or Israel Standard Time. Learn each offset, when they're used, and how to avoid...
guidesIst irish standard timeIrish Standard Time (IST) is UTC+1, India Standard Time is UTC+5:30. They share an abbreviation but are 4.5 or 5.5 hours apart.
guidesIst railway time historyHow Indian Railways drove the adoption of India Standard Time in 1906. The train timetables, the Mirzapur meridian, and the end of local times.
guidesIst sri lanka timeDoes Sri Lanka use the same time as India? Yes, same offset (UTC+5:30) but different legal time zone. IANA zone Asia/Colombo.