Bucharest is 5 hours ahead of Montevideo
Best overlap: 8:00 AM to 1:00 PM in Montevideo is 1:00 PM to 6:00 PM in Bucharest.
For the smoothest call, aim inside 8:00 AM to 1:00 PM in Montevideo, i.e. 1:00 PM to 6:00 PM in Bucharest. A 5-hour overlap gives you a workable daily window; aim for earlier in it to avoid clipping the end of someone's day. Seasonal note: Bucharest uses daylight saving and Montevideo doesn't, so double-check the times in your own months — they can move by an hour.