Rome 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 Rome.
The sweet spot is 8:00 AM to 10:00 AM Mexico City time, matching 4:00 PM to 6:00 PM in Rome. Because Rome is 8 hours ahead of Mexico City, the shared window is only about 2 hours. A fixed slot at 8:00 AM in Mexico City (4:00 PM in Rome) saves a lot of back-and-forth. The window above shifts seasonally: Rome keeps daylight saving while Mexico City ignores it.