Casablanca is 9 hours ahead of Portland
Best overlap: 8:00 AM to 9:00 AM in Portland is 5:00 PM to 6:00 PM in Casablanca.
For the smoothest call, aim inside 8:00 AM to 9:00 AM in Portland, i.e. 5:00 PM to 6:00 PM in Casablanca. Casablanca is 9 hours ahead of Portland, so common hours are scarce (about 1 hour). Lock the slot, keep it short, and follow up in writing. Don't be caught out by clock changes — Portland observes daylight saving and Casablanca doesn't, so the offset varies by an hour through the year.