Honolulu is 12 hours behind Frankfurt

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

A 12-hour difference puts Frankfurt and Honolulu out of sync — when one team is mid-morning, the other is fast asleep. Consider rotating the inconvenience: one week Frankfurt takes the early call, the next week Honolulu does. Finally, Frankfurt 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.