Best overlap: 2:00 PM to 6:00 PM in Kolkata is 8:30 AM to 12:30 PM in Reykjavik.
Aim for 2:00 PM to 6:00 PM Kolkata time — that's 8:30 AM to 12:30 PM over in Reykjavik. With 4 hours of overlap, 2:00 PM in Kolkata (8:30 AM in Reykjavik) is a comfortable, repeatable slot for both sides.
| 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 | ||||||||||||||||||||||||
Reykjavik Atlantic/Reykjavik |
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. -