Cairo is 7 hours ahead of Boston (EST) or 6 hours ahead (EDT). When it's 9:00 AM in Boston, it's 4:00 PM in Cairo. Egypt observes DST at different times than the US.
Boston uses ET (Eastern Time) while Cairo uses EET (Eastern European Time).
Optimal window: 7:00 AM - 11:00 AM Boston time (2:00 PM - 6:00 PM Cairo). Early morning calls from Boston reach afternoon business hours in Cairo.
Boston universities have archaeological and academic partnerships with Egyptian institutions.