Copenhagen is 5 hours behind Dhaka
Best overlap: 1:00 PM to 6:00 PM in Dhaka is 8:00 AM to 1:00 PM in Copenhagen.
For the smoothest call, aim inside 1:00 PM to 6:00 PM in Dhaka, i.e. 8:00 AM to 1:00 PM in Copenhagen. Since Copenhagen is 5 hours behind Dhaka, the workdays overlap by around 5 hours; 1:00 PM in Dhaka (8:00 AM in Copenhagen) makes a reliable recurring slot. Note that Copenhagen follows daylight saving while Dhaka stays put, so the times above drift by an hour seasonally.