Bucharest is 8 hours ahead of Dallas
Best overlap: 8:00 AM to 10:00 AM in Dallas is 4:00 PM to 6:00 PM in Bucharest.
8:00 AM to 10:00 AM in Dallas is when Bucharest is also working, at 4:00 PM to 6:00 PM their time. Because Bucharest is 8 hours ahead of Dallas, the shared window is only about 2 hours. A fixed slot at 8:00 AM in Dallas (4:00 PM in Bucharest) saves a lot of back-and-forth.