Cairo is 1 hour ahead of Hamburg
Best overlap: 8:00 AM to 5:00 PM in Hamburg is 9:00 AM to 6:00 PM in Cairo.
The hours that work for both Hamburg and Cairo are 8:00 AM to 5:00 PM (Hamburg) and 9:00 AM to 6:00 PM (Cairo). A 9-hour overlap gives you real choice here — early or late in the window both work comfortably.