Best overlap: 8:00 AM to 1:00 PM in Paris is 1:00 PM to 6:00 PM in Hanoi.
The best time to meet is 8:00 AM to 1:00 PM in Paris, which is 1:00 PM to 6:00 PM in Hanoi. Hanoi is 5 hours ahead of Paris, leaving about 5 hours of shared hours — plan recurring calls early in that window to leave buffer. The difference isn't constant year-round: Paris adjusts for daylight saving while Hanoi holds steady.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Paris Europe/Paris | ||||||||||||||||||||||||
Hanoi Asia/Ho Chi Minh |
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. -
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