Oslo is 12 hours ahead of Honolulu

There is no standard 8-to-6 overlap. Someone joins early or late.

A 12-hour difference puts Honolulu and Oslo out of sync — when one team is mid-morning, the other is fast asleep. Consider rotating the inconvenience: one week Honolulu takes the early call, the next week Oslo does. Finally, Oslo observes daylight saving and Honolulu doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.