Dallas is 7 hours behind Hamburg
Best overlap: 3:00 PM to 6:00 PM in Hamburg is 8:00 AM to 11:00 AM in Dallas.
Schedule calls for 3:00 PM to 6:00 PM in Hamburg — your colleagues in Dallas will be online from 8:00 AM to 11:00 AM. Dallas is 7 hours behind Hamburg, leaving about 3 hours of daily overlap — enough for most meetings if you don't leave them too late in the day.