Addis Ababa 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 Addis Ababa.
Dallas and Addis Ababa overlap from 8:00 AM to 10:00 AM (Dallas) to the equivalent 4:00 PM to 6:00 PM in Addis Ababa — that's your meeting window. The shared window is only 2 hours — treat 8:00 AM in Dallas (4:00 PM in Addis Ababa) as the one fixed point and plan everything else around it. Note the seasonal wrinkle: when Dallas is on daylight saving and Addis Ababa isn't, the gap between them grows or shrinks by an hour.