Mexico City is 2 hours behind Philadelphia
Best overlap: 10:00 AM to 6:00 PM in Philadelphia is 8:00 AM to 4:00 PM in Mexico City.
Philadelphia and Mexico City overlap from 10:00 AM to 6:00 PM (Philadelphia) to the equivalent 8:00 AM to 4:00 PM in Mexico City — that's your meeting window. Mexico City is 2 hours behind Philadelphia, yet you get a full 8 hours of shared hours — enough to schedule around lunches, focus time, and preferences with ease. One seasonal catch: Philadelphia springs forward and falls back, but Mexico City doesn't, so the gap changes by an hour for several months of the year.