Dhaka is 14 hours ahead of Portland
There is no standard 8-to-6 overlap. Someone joins early or late.
Dhaka is 14 hours ahead of Portland, which is far enough that a normal 9-to-5 in one city never reaches the other's working hours. One practical option: Portland dials in early while it's still late afternoon or evening in Dhaka. Keep an eye on the calendar — Portland observes daylight saving and Dhaka doesn't, which nudges this window by an hour twice a year.