Best overlap: 1:00 PM to 6:00 PM in Edinburgh is 8:00 AM to 1:00 PM in Medellín.
Both offices are open during 1:00 PM to 6:00 PM Edinburgh time, which is 8:00 AM to 1:00 PM in Medellín. Medellín is 5 hours behind Edinburgh. That leaves about 5 hours of common time — enough for a meeting or two, so use it deliberately. The window above shifts seasonally: Edinburgh keeps daylight saving while Medellín ignores it.
London to New York is five hours apart, except for the five weeks a year when it isn't. Exact overlap windows for every US zone, the 2026 DST mismatch dates, and where to put the recurring sync. -