The city of Mosul is distinguished by the fact that its citizens come from different ethnic religious backgrounds, but they share some customs and traditions, which if they differ in appearance, but they intersect in many details, and the holidays are one of these occasions, and most of these holidays are celebrated at close times, the most important of which is the Festival Mosul, which is in April, and there is also the Nowruz and Akitu festival for the Chaldeans and Assyrians in the same season (spring), while other holidays are linked to lunar timings such as Eid Al-Fitr, and Red Wednesday is linked to this day.