Copenhagen 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 Copenhagen.
For a call that suits both sides, look at 8:00 AM to 11:00 AM in Mexico City / 3:00 PM to 6:00 PM in Copenhagen. Around 3 hours of overlap is enough to work comfortably, as long as meetings don't drift to the end of one team's day. Because Copenhagen and Mexico City don't both observe daylight saving, plan to re-check the overlap around March and November.