Montevideo is 5 hours behind Oslo
Best overlap: 1:00 PM to 6:00 PM in Oslo is 8:00 AM to 1:00 PM in Montevideo.
Aim for 1:00 PM to 6:00 PM Oslo time — that's 8:00 AM to 1:00 PM over in Montevideo. Montevideo is 5 hours behind Oslo, leaving about 5 hours of daily overlap — enough for most meetings if you don't leave them too late in the day. Finally, Oslo observes daylight saving and Montevideo doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.