Kolkata keeps UTC+5:30 (IST) all year. There is no daylight saving time, so the clock never changes.
Kolkata and your time
Kolkata at a glance
| Country | India |
|---|---|
| Region | West Bengal |
| Time zone | Asia/Kolkata |
| Abbreviation now | IST |
| UTC offset now | UTC+5:30 |
| Daylight saving time | Not observed |
| Coordinates | 22.56° N, 88.36° E |
Kolkata time zone and clock changes
Kolkata follows the Asia/Kolkata time zone and stays on UTC+5:30 all year. The tz database records no daylight saving time here since 1970.
Because UTC+5:30 ends in :30, a call booked on the hour in London or New York starts at half past the hour in Kolkata.
Kolkata is on the same time as the rest of India, including the capital, New Delhi.
Clock changes in Kolkata, 2026 and 2027
No clock changes are scheduled in Kolkata for 2026 or 2027.
Time difference between Kolkata and other cities
When it is 9:00 AM in Kolkata, it is 10:30 PM (previous day) in New York, 2:30 PM in Sydney and 7:30 PM (previous day) in Los Angeles.
| City | Time now | Difference now | In January | In July | Shared office hours |
|---|---|---|---|---|---|
| New York (United States) | --:-- | 10 h 30 min behind | 10 h 30 min behind | 9 h 30 min behind | None |
| Los Angeles (United States) | --:-- | 13 h 30 min behind | 13 h 30 min behind | 12 h 30 min behind | None |
| London (United Kingdom) | --:-- | 5 h 30 min behind | 5 h 30 min behind | 4 h 30 min behind | 2 h 30 min |
| Paris (France) | --:-- | 4 h 30 min behind | 4 h 30 min behind | 3 h 30 min behind | 3 h 30 min |
| Dubai (United Arab Emirates) | --:-- | 1 h 30 min behind | 1 h 30 min behind | 1 h 30 min behind | 6 h 30 min |
| Singapore | --:-- | 2 h 30 min ahead | 2 h 30 min ahead | 2 h 30 min ahead | 5 h 30 min |
| Tokyo (Japan) | --:-- | 3 h 30 min ahead | 3 h 30 min ahead | 3 h 30 min ahead | 4 h 30 min |
| Sydney (Australia) | --:-- | 5 h 30 min ahead | 5 h 30 min ahead | 4 h 30 min ahead | 2 h 30 min |
| UTC | --:-- | 5 h 30 min behind | 5 h 30 min behind | 5 h 30 min behind | 2 h 30 min |
Kolkata never changes its clocks, but many of these cities do. Where the January and July columns disagree, the gap shifts when the other city moves to or from daylight saving time.
Shared office hours is the part of a 9 AM to 5 PM local working day that both cities have in common. Weekends are not taken into account.
Sunrise and sunset in Kolkata
Today
| Sunrise | --:-- |
|---|---|
| Sunset | --:-- |
| Day length | -- |
| Solar noon | --:-- |
Day length barely moves in Kolkata, from 10 hours 45 minutes to 13 hours 31 minutes. Sunrise and sunset shift by less than an hour across the year.
Daylight through the year in Kolkata
| Date | Sunrise | Sunset | Day length | |
|---|---|---|---|---|
| March equinox | March 20 | 5:41 AM | 5:48 PM | 12 h 7 min |
| June solstice | June 21 | 4:53 AM | 6:24 PM | 13 h 31 min |
| September equinox | September 23 | 5:26 AM | 5:32 PM | 12 h 7 min |
| December solstice | December 22 | 6:12 AM | 4:58 PM | 10 h 45 min |
Clock time and sun time in Kolkata
Kolkata lies close to the centre of its time zone, so the sun is highest at about 11:35 AM on standard time, close to clock noon.
Places close to Kolkata
Only 75 km (46 mi) away, Satkhira in Bangladesh is 30 minutes ahead of Kolkata. Crossing between the two means resetting your watch.
| City | Distance | Time now | Difference |
|---|---|---|---|
| Barasat | 21 km (13 mi) | --:-- | Same time |
| Uluberia | 29 km (18 mi) | --:-- | Same time |
| Bhatpara | 34 km (21 mi) | --:-- | Same time |
| Habra | 43 km (27 mi) | --:-- | Same time |
| Basirhat | 52 km (32 mi) | --:-- | Same time |
| Haldia | 62 km (38 mi) | --:-- | Same time |
| Bangaon | 72 km (45 mi) | --:-- | Same time |
| Satkhira (Bangladesh) | 75 km (46 mi) | --:-- | 30 min ahead |
More cities in India
All time zones and cities in India
Tools for time in Kolkata
- Convert a time to or from Kolkata: pick a date and time and see it in every city on your list.
- Add Kolkata to your world clock to keep it next to your own time.
- Find a meeting time that falls inside office hours in Kolkata and the other cities you work with.
- Open a full-screen clock for your own time zone.
Frequently asked questions
What time zone is Kolkata in?
Kolkata uses the Asia/Kolkata time zone, which is UTC+5:30 (IST) all year.
Does Kolkata use daylight saving time?
No. Kolkata stays on UTC+5:30 all year, so the time difference to places without daylight saving time never changes.
What is the time difference between Kolkata and New York?
Kolkata is 10 hours 30 minutes ahead of New York in January and 9 hours 30 minutes ahead of New York in July, because New York moves its clocks for daylight saving time and Kolkata does not.
Is Kolkata on the same time as New Delhi?
Yes. Kolkata and New Delhi both use UTC+5:30 right now.
How long is the longest day in Kolkata?
About 13 hours 31 minutes, around the June solstice. The shortest day, around the December solstice, has about 10 hours 45 minutes of daylight.
Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.