Prague is 6 hours ahead of Washington, D.C.
Best overlap: 8:00 AM to 12:00 PM in Washington, D.C. is 2:00 PM to 6:00 PM in Prague.
Washington, D.C. and Prague overlap from 8:00 AM to 12:00 PM (Washington, D.C.) to the equivalent 2:00 PM to 6:00 PM in Prague — that's your meeting window. Prague is 6 hours ahead of Washington, D.C., leaving about 4 hours of shared hours — plan recurring calls early in that window to leave buffer.