There is no standard 8-to-6 overlap. Someone joins early or late.
Given London is 11 hours ahead of Honolulu, the realistic answer is that there's no convenient shared slot during normal business hours. Catch the edges of the day: the last hour for London or the first hour for Honolulu is usually the least painful option. Because only London changes its clocks, the overlap above isn't fixed; expect a one-hour shift when London enters or leaves daylight saving.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Honolulu Pacific/Honolulu | ||||||||||||||||||||||||
London Europe/London |
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