Is it permissible to fast the ninth day of Dhul-Hijjah in Morocco, which corresponds to the Day of Sacrifice for pilgrims in Saudi Arabia?

If Morocco relies on sighting the crescent moon, not astronomical calculations, to determine the beginning of the month, then fasting and breaking fast are based on the local date. However, if Morocco relies on astronomical calculations, then it must follow the closest country that shares their moon-sighting horizons and relies on crescent sighting, not astronomical calculations. In that case, they do not fast on the day of Eid in that country, and they fast on its ninth day.