Dhaka is 4 hours ahead of Prague

Best overlap: 8:00 AM to 2:00 PM in Prague is 12:00 PM to 6:00 PM in Dhaka.

For the smoothest call, aim inside 8:00 AM to 2:00 PM in Prague, i.e. 12:00 PM to 6:00 PM in Dhaka. That's a roomy 6 hours of common time each day, so finding a slot that suits everyone is rarely a problem. Daylight saving complicates things slightly: Prague observes it, Dhaka doesn't, so the difference flexes by an hour part of the year.