Portland is 21 hours behind Wellington
Best overlap: 8:00 AM to 3:00 PM in Wellington is 11:00 AM to 6:00 PM in Portland.
Keep meetings inside 8:00 AM to 3:00 PM in Wellington — that maps to 11:00 AM to 6:00 PM in Portland. Portland is 21 hours behind Wellington, but the generous 7-hour window means both teams can meet well within their normal day. Don't get caught out: Portland is the previous day from Wellington, so "tomorrow" means different things to each team.