Best overlap: 5:00 PM to 6:00 PM in Honolulu is 8:30 AM to 9:30 AM in Kolkata.
Plan around 5:00 PM to 6:00 PM in Honolulu, which is 8:30 AM to 9:30 AM in Kolkata, to catch everyone during office hours. Overlap is at a premium — roughly 1 hour — so claim 5:00 PM in Honolulu (8:30 AM in Kolkata) for recurring calls and keep them on time. Remember Kolkata is a day apart — the next day — so a late call for Honolulu could be the following morning there.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Honolulu Pacific/Honolulu | ||||||||||||||||||||||||
Kolkata Asia/Kolkata |
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. -