Most of the sightseeing in Egypt open from 9 AM until 5 PM. Open-air historical sites, like the Pyramids of Giza, are open from 8 AM. But some museums have morning opening hours, from 9 AM to 4 PM evening opening hours, from 5 PM to 9 or 10 PM. During Ramadan, the holy month of the Islamic calendar, be aware that these hours will change significantly.