Best overlap: 8:30 AM to 9:30 AM in Brasília is 5:00 PM to 6:00 PM in Kolkata.
The hours that work for both Brasília and Kolkata are 8:30 AM to 9:30 AM (Brasília) and 5:00 PM to 6:00 PM (Kolkata). Kolkata is 8.5 hours ahead of Brasília, leaving a tight 1-hour window. Book 8:30 AM in Brasília (5:00 PM in Kolkata) early and you'll dodge the daily scramble.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Brasília America/Sao Paulo | ||||||||||||||||||||||||
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. -