The Mwaka Kogwa is a « battle » and four-day-long celebration of the Shirazi/Zoroastrian (Persian) New Year that happens regularly south of Zanzibar. It is traditionally believed that since everyone has had a chance to fight, or to vent any hard feelings, there would be no future conflicts in the town in the coming year. Past year's misunderstandings and disagreements are exorcised and the new year can be started with a clean slate and in harmony .