Oslo 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 Oslo.
Schedule calls for 8:00 AM to 12:00 PM in Washington, D.C. — your colleagues in Oslo will be online from 2:00 PM to 6:00 PM. Oslo is 6 hours ahead of Washington, D.C., which gives you a solid 4-hour window. Book earlier in it and neither side is rushing.