Ho Chi Minh City is 6 hours ahead of Hamburg
Best overlap: 8:00 AM to 12:00 PM in Hamburg is 2:00 PM to 6:00 PM in Ho Chi Minh City.
Keep meetings inside 8:00 AM to 12:00 PM in Hamburg — that maps to 2:00 PM to 6:00 PM in Ho Chi Minh City. With 4 hours of overlap, 8:00 AM in Hamburg (2:00 PM in Ho Chi Minh City) is a comfortable, repeatable slot for both sides. Because Hamburg and Ho Chi Minh City don't both observe daylight saving, plan to re-check the overlap around March and November.