Best overlap: 11:30 AM to 6:30 PM in Kolkata is 8:00 AM to 3:00 PM in Warsaw.
The hours that work for both Kolkata and Warsaw are 11:30 AM to 6:30 PM (Kolkata) and 8:00 AM to 3:00 PM (Warsaw). You won't be short on options — 7 hours of overlap leaves space for recurring syncs and ad-hoc calls alike. One seasonal catch: Warsaw springs forward and falls back, but Kolkata doesn't, so the gap changes by an hour for several months of the year.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Kolkata Asia/Kolkata | ||||||||||||||||||||||||
Warsaw Europe/Warsaw |
A complete guide to time zones in 2025, from UTC and GMT differences to Daylight Saving Time changes, IANA database rules, abbreviation pitfalls, and developer best practices for handling global time. -