Montevideo is 5 hours behind Barcelona
Best overlap: 1:00 PM to 6:00 PM in Barcelona is 8:00 AM to 1:00 PM in Montevideo.
For a call that suits both sides, look at 1:00 PM to 6:00 PM in Barcelona / 8:00 AM to 1:00 PM in Montevideo. Around 5 hours of overlap is enough to work comfortably, as long as meetings don't drift to the end of one team's day. Keep an eye on the calendar — Barcelona observes daylight saving and Montevideo doesn't, which nudges this window by an hour twice a year.