Madrid 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 Madrid.

The overlap falls at 8:00 AM to 10:00 AM in Mexico City, or 4:00 PM to 6:00 PM if you're in Madrid. There's roughly 2 hours to share, so keep agendas lean and meet at 8:00 AM in Mexico City (4:00 PM in Madrid) to use every minute. Watch the DST gap — when Madrid changes its clocks and Mexico City stays the same, this window slides by an hour.