Oslo is 6 hours ahead of Philadelphia
Best overlap: 8:00 AM to 12:00 PM in Philadelphia is 2:00 PM to 6:00 PM in Oslo.
The best time to meet is 8:00 AM to 12:00 PM in Philadelphia, which is 2:00 PM to 6:00 PM in Oslo. Oslo is 6 hours ahead of Philadelphia, leaving about 4 hours of shared hours — plan recurring calls early in that window to leave buffer.