Copenhagen is 6 hours ahead of Medellín
Best overlap: 8:00 AM to 12:00 PM in Medellín is 2:00 PM to 6:00 PM in Copenhagen.
Both teams are at their desks between 8:00 AM to 12:00 PM in Medellín and 2:00 PM to 6:00 PM in Copenhagen. The shared window is roughly 4 hours; treat its midpoint as the default and you'll keep both teams happy. Note the seasonal wrinkle: when Copenhagen is on daylight saving and Medellín isn't, the gap between them grows or shrinks by an hour.