Portland is 8 hours behind Accra
Best overlap: 4:00 PM to 6:00 PM in Accra is 8:00 AM to 10:00 AM in Portland.
The overlap falls at 4:00 PM to 6:00 PM in Accra, or 8:00 AM to 10:00 AM if you're in Portland. Just 2 hours of shared hours means there's little margin — set 4:00 PM in Accra (8:00 AM in Portland) and start promptly. Watch the DST gap — when Portland changes its clocks and Accra stays the same, this window slides by an hour.