Lonely Planet
The best time to visit Morocco
The ideal time to visit Morocco depends on where your interests lie - on top of a mountain, by the sea, in the cities or amid desert dunes.
dates vary late May to September

“The Fez Festival of World Sacred Music is an annual music festival that is held for a week in Fez, Morocco. It was first held in 1994 and usually held over 10 days in early June. The festival includes concerts, debates, and joint performances of Muslim and Christian devotional music from artists…”