Prague is 7 hours ahead of Mexico City
Best overlap: 8:00 AM to 11:00 AM in Mexico City is 3:00 PM to 6:00 PM in Prague.
If you set up a recurring sync, 8:00 AM to 11:00 AM in Mexico City (3:00 PM to 6:00 PM in Prague) is the natural home for it. You share roughly 3 hours a day. That's enough for regular meetings, but treat the window as prime time and guard it. These times hold for most of the year, but Prague's daylight saving (which Mexico City doesn't use) shifts them by an hour twice annually.