Medellín is 3 hours ahead of San Diego
Best overlap: 8:00 AM to 3:00 PM in San Diego is 11:00 AM to 6:00 PM in Medellín.
For a call that suits both sides, look at 8:00 AM to 3:00 PM in San Diego / 11:00 AM to 6:00 PM in Medellín. Despite the 3-hour difference, a 7-hour overlap keeps things simple and gives both teams breathing room. Remember that San Diego shifts for daylight saving and Medellín doesn't, so recalculate the overlap after each clock change.