Hong Kong is 16 hours ahead of Portland
Best overlap: 4:00 PM to 6:00 PM in Portland is 8:00 AM to 10:00 AM in Hong Kong.
The hours that work for both Portland and Hong Kong are 4:00 PM to 6:00 PM (Portland) and 8:00 AM to 10:00 AM (Hong Kong). You've got roughly 2 hours — enough for a focused daily check-in if you hold it at 4:00 PM in Portland (8:00 AM in Hong Kong). When booking, note that Hong Kong is on the next day — it's worth spelling out the full date in the invite. One seasonal catch: Portland springs forward and falls back, but Hong Kong doesn't, so the gap changes by an hour for several months of the year.