Time zone in Kolkata
- Time zone: India Standard Time
- UTC offset right now: UTC+5:30
- IANA time zone ID: Asia/Kolkata
- Country: India
Daylight saving time
Kolkata does not observe daylight saving time, so the clock stays on India Standard Time (UTC+5:30) all year. That makes the gap to places that do switch, like New York or London, change by an hour twice a year.
Good to know
All of India runs on a single time zone, India Standard Time, at UTC+5:30. The half-hour offset means India sits 30 minutes off from most of its neighbours, and the country does not use daylight saving time.
Kolkata compared to other cities
| City | Time now | vs. Kolkata |
|---|---|---|
| New York | — | 9 hrs 30 min behind |
| Los Angeles | — | 12 hrs 30 min behind |
| Chicago | — | 10 hrs 30 min behind |
| London | — | 4 hrs 30 min behind |
| Paris | — | 3 hrs 30 min behind |
| Dubai | — | 1 hr 30 min behind |
| Mumbai | — | Same time |
| Tokyo | — | 3 hrs 30 min ahead |
Planning a call? Use the time zone converter to check any time of day.
Calling Kolkata
Normal office hours in Kolkata and New York don't overlap. The most workable window is 7 AM to 12:30 PM in New York, which is 4:30 PM to 10 PM in Kolkata, with one side starting early or finishing late.
Office hours in Kolkata and London overlap for about 3.5 hours a day, from 9 AM to 12:30 PM in London (1:30 PM to 5 PM in Kolkata).
When it's 9 AM in Kolkata today, it's New York: Sun 11:30 PM · London: Mon 4:30 AM · Dubai: Mon 7:30 AM · Tokyo: Mon 12:30 PM · Sydney: Mon 2:30 PM.