Best overlap: 8:00 AM to 11:00 AM in Edinburgh is 3:00 PM to 6:00 PM in Ho Chi Minh City.
If you set up a recurring sync, 8:00 AM to 11:00 AM in Edinburgh (3:00 PM to 6:00 PM in Ho Chi Minh City) is the natural home for it. Ho Chi Minh City is 7 hours ahead of Edinburgh, which gives you a solid 3-hour window. Book earlier in it and neither side is rushing. Remember that Edinburgh shifts for daylight saving and Ho Chi Minh City doesn't, so recalculate the overlap after each clock change.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Edinburgh Europe/London | ||||||||||||||||||||||||
Ho Chi Minh City 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. -