Dhaka is 6 hours ahead of Reykjavik
Best overlap: 8:00 AM to 12:00 PM in Reykjavik is 2:00 PM to 6:00 PM in Dhaka.
For the smoothest call, aim inside 8:00 AM to 12:00 PM in Reykjavik, i.e. 2:00 PM to 6:00 PM in Dhaka. Since Dhaka is 6 hours ahead of Reykjavik, the workdays overlap by around 4 hours; 8:00 AM in Reykjavik (2:00 PM in Dhaka) makes a reliable recurring slot.