Best overlap: 8:30 AM to 12:30 PM in Manchester is 2:00 PM to 6:00 PM in Kolkata.
Target 8:30 AM to 12:30 PM in Manchester, which lands at 2:00 PM to 6:00 PM for the Kolkata side. Kolkata is 5.5 hours ahead of Manchester, so the practical overlap is about 4 hours — generous enough for meetings, tight enough to be worth booking ahead. Note that Manchester follows daylight saving while Kolkata stays put, so the times above drift by an hour seasonally.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Manchester Europe/London | ||||||||||||||||||||||||
Kolkata Asia/Kolkata |
London to New York is five hours apart, except for the five weeks a year when it isn't. Exact overlap windows for every US zone, the 2026 DST mismatch dates, and where to put the recurring sync. -
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. -