Cairo is 10 hours ahead of Phoenix

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

There's no shared 9-to-5 between Phoenix and Cairo; at 10 hours apart, one city's workday is the other's evening or night. Your best bet is one team taking an early-morning or late-evening call — alternating who stretches keeps it fair over time. These times hold for most of the year, but Cairo's daylight saving (which Phoenix doesn't use) shifts them by an hour twice annually.