Barcelona 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 Barcelona.
Plan around 8:00 AM to 12:00 PM in Medellín, which is 2:00 PM to 6:00 PM in Barcelona, to catch everyone during office hours. Since Barcelona is 6 hours ahead of Medellín, the workdays overlap by around 4 hours; 8:00 AM in Medellín (2:00 PM in Barcelona) makes a reliable recurring slot. Seasonal note: Barcelona uses daylight saving and Medellín doesn't, so double-check the times in your own months — they can move by an hour.