Brasília is 6 hours behind Moscow
Best overlap: 2:00 PM to 6:00 PM in Moscow is 8:00 AM to 12:00 PM in Brasília.
Target 2:00 PM to 6:00 PM in Moscow, which lands at 8:00 AM to 12:00 PM for the Brasília side. Brasília is 6 hours behind Moscow, so you've got a workable 4-hour overlap — ideal for a standing meeting around 2:00 PM in Moscow (8:00 AM in Brasília).