Doha is 1 hour ahead of Brussels
Best overlap: 8:00 AM to 5:00 PM in Brussels is 9:00 AM to 6:00 PM in Doha.
If you set up a recurring sync, 8:00 AM to 5:00 PM in Brussels (9:00 AM to 6:00 PM in Doha) is the natural home for it. Doha is 1 hour ahead of Brussels, but you still share a generous 9 hours of overlap, so scheduling is easy and there's room to move a meeting when you need to. These times hold for most of the year, but Brussels's daylight saving (which Doha doesn't use) shifts them by an hour twice annually.