Medellín is 5 hours ahead of Honolulu
Best overlap: 8:00 AM to 1:00 PM in Honolulu is 1:00 PM to 6:00 PM in Medellín.
8:00 AM to 1:00 PM in Honolulu is when Medellín is also working, at 1:00 PM to 6:00 PM their time. You've got a decent 5-hour window. Set a recurring time near 8:00 AM in Honolulu (1:00 PM in Medellín) and stick to it.