India Standard Time → Coordinated Universal Time · IST is 5 hours 30 minutes ahead of UTC
IST and UTC are the same time
| IST | UTC |
|---|---|
| 12:00 AM | 12:00 AM |
| 1:00 AM | 1:00 AM |
| 2:00 AM | 2:00 AM |
| 3:00 AM | 3:00 AM |
| 4:00 AM | 4:00 AM |
| 5:00 AM | 5:00 AM |
| 6:00 AM | 6:00 AM |
| 7:00 AM | 7:00 AM |
| 8:00 AM | 8:00 AM |
| 9:00 AM | 9:00 AM |
| 10:00 AM | 10:00 AM |
| 11:00 AM | 11:00 AM |
| 12:00 PM | 12:00 PM |
| 1:00 PM | 1:00 PM |
| 2:00 PM | 2:00 PM |
| 3:00 PM | 3:00 PM |
| 4:00 PM | 4:00 PM |
| 5:00 PM | 5:00 PM |
| 6:00 PM | 6:00 PM |
| 7:00 PM | 7:00 PM |
| 8:00 PM | 8:00 PM |
| 9:00 PM | 9:00 PM |
| 10:00 PM | 10:00 PM |
| 11:00 PM | 11:00 PM |
Green rows = business hours overlap (9:00 AM – 6:00 PM IST)
IST (UTC+5:30) — India Standard Time, one of only a handful of half-hour UTC offsets in the world. No DST, fixed year-round. Used across the entire Indian subcontinent — India has a single national time zone.
UTC (UTC+0) — The world's primary time standard. All other zones are offset from UTC.
The half-hour offset means IST conversions always produce :00 or :30 minutes — never :15 or :45. For tech teams: UTC midnight = 5:30 AM IST; UTC noon = 5:30 PM IST.
IST (India Standard Time) is UTC+5:30 — 5 hours and 30 minutes ahead of UTC. India does not observe Daylight Saving Time, making IST a fixed offset year-round. The :30 half-hour component is what makes IST conversions distinctive.
To convert IST to UTC, subtract 5 hours and 30 minutes. Examples: 9:00 AM IST = 3:30 AM UTC. 12:00 PM (noon) IST = 6:30 AM UTC. 6:00 PM IST = 12:30 PM UTC. 11:30 PM IST = 6:00 PM UTC. Since India has no DST, this formula is constant throughout the year.
India uses UTC+5:30 because when India standardised its time zone in 1906, it chose the 82°30'E meridian — exactly halfway between UTC+5 and UTC+6. Using a single national time zone across a country spanning over 30 degrees of longitude was a political decision for unity, and the half-hour offset was the compromise.
00:00 UTC (midnight UTC) is 05:30 IST (5:30 AM India Standard Time). For developers: when working with UTC timestamps in Indian systems, add 5.5 hours (19,800 seconds) to get IST. UTC noon (12:00) = IST 17:30 (5:30 PM).