Barcelona is 8 hours ahead of Mexico City
Best overlap: 8:00 AM to 10:00 AM in Mexico City is 4:00 PM to 6:00 PM in Barcelona.
Mexico City and Barcelona overlap from 8:00 AM to 10:00 AM (Mexico City) to the equivalent 4:00 PM to 6:00 PM in Barcelona — that's your meeting window. Barcelona is 8 hours ahead of Mexico City, leaving a tight 2-hour window. Book 8:00 AM in Mexico City (4:00 PM in Barcelona) early and you'll dodge the daily scramble. Note the seasonal wrinkle: when Barcelona is on daylight saving and Mexico City isn't, the gap between them grows or shrinks by an hour.