Brussels is 4 hours behind Dhaka
Best overlap: 12:00 PM to 6:00 PM in Dhaka is 8:00 AM to 2:00 PM in Brussels.
The best time to meet is 12:00 PM to 6:00 PM in Dhaka, which is 8:00 AM to 2:00 PM in Brussels. 6 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved. One seasonal catch: Brussels springs forward and falls back, but Dhaka doesn't, so the gap changes by an hour for several months of the year.