A Passover Seder is a service held at home as part of the Passover celebration. It is always observed on the first night of Passover, and in some homes on the second night as well. On both nights, the seder concludes with a dinner. Participants use a book called the Haggadah to lead the service. “Hagaddah” means “the telling,” in Hebrew, and it contains instructions for the seder, blessings and the Passover story.
The word “seder” literally means “order” in Hebrew. The name comes from the fact that there are 15 parts of the ritual service, all revolving around the upcoming Passover dinner. Food is an important symbolic element of Passover.