Brussels 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 Brussels.
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 Brussels. The overlap is tight at roughly 2 hours, so protect it: 8:00 AM in Mexico City / 4:00 PM in Brussels is your safest recurring slot. Because only Brussels changes its clocks, the overlap above isn't fixed; expect a one-hour shift when Brussels enters or leaves daylight saving.