Munich is 7 hours ahead of Dallas
Best overlap: 8:00 AM to 11:00 AM in Dallas is 3:00 PM to 6:00 PM in Munich.
If you set up a recurring sync, 8:00 AM to 11:00 AM in Dallas (3:00 PM to 6:00 PM in Munich) is the natural home for it. Around 3 hours of overlap is enough to work comfortably, as long as meetings don't drift to the end of one team's day.