The Seder for the night of Rosh Hashanah is the Jewish tradition of eating a festive meal composed of symbolic foods, reciting psalms, and singing zmirot.
The word seder means "order" in Hebrew, denoting the specific and ritually meaningful order in which the courses of the meal proceeds.
Generally, symbolic foods to be eaten during the Seder are known the Simanim (literally, "symbols" or "signs"), eaten in a specific order, with the appropriate blessings over the food.[1]