Sunset in the desert of Douz Tunisia

Given the sweltering heat and the hot desert sun, all excursions / tours (whether by camel, quad, buggy, etc.) are usually scheduled in the early morning or late afternoon when the the sun rises or sets. We went to the Grande Dune Offra at 16h by dromedary through the "sea of sand", so we had the chance to watch the sunset, reddish, between the dunes and see how it changes color is a beautiful show. The only problem was that we had suffered a nasty sandstorm (apparently in spring they are very common), where we literally ate the sand dunes.