Geneva is 4 hours ahead of Montevideo
Best overlap: 8:00 AM to 2:00 PM in Montevideo is 12:00 PM to 6:00 PM in Geneva.
Your shared working hours run 8:00 AM to 2:00 PM in Montevideo (12:00 PM to 6:00 PM in Geneva). With 6 hours in common, treat scheduling almost as if the two cities were in the same region. The window above shifts seasonally: Geneva keeps daylight saving while Montevideo ignores it.