Passover is a Jewish holiday celebrated on the 15th day of the month of Nissan to remember the story of the exodus from Egypt, where God passed over Jewish houses, sparing their firstborn from the tenth plague against the Egyptians of killing all firstborn sons. During the Passover Seder feast, rituals include a child hiding a piece of matzo bread called the afikomen for their parents to find, with the child getting rewarded if the parents cannot locate it.