Kyiv is 7 hours ahead of Medellín
Best overlap: 8:00 AM to 11:00 AM in Medellín is 3:00 PM to 6:00 PM in Kyiv.
Aim for 8:00 AM to 11:00 AM Medellín time — that's 3:00 PM to 6:00 PM over in Kyiv. Kyiv is 7 hours ahead of Medellín, which gives you a solid 3-hour window. Book earlier in it and neither side is rushing. Finally, Kyiv observes daylight saving and Medellín doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.