Lagos is 9 hours ahead of Portland
Best overlap: 8:00 AM to 9:00 AM in Portland is 5:00 PM to 6:00 PM in Lagos.
Your shared working hours run 8:00 AM to 9:00 AM in Portland (5:00 PM to 6:00 PM in Lagos). There's roughly 1 hour to share, so keep agendas lean and meet at 8:00 AM in Portland (5:00 PM in Lagos) to use every minute. Because only Portland changes its clocks, the overlap above isn't fixed; expect a one-hour shift when Portland enters or leaves daylight saving.