The Jewish Sages say that Passover occurs on the 15th of Nissan just as the moon grows for 15 days. The conclusion is that the Jews' growth must be in 15 gradual steps just like the Passover puzzle is constituted by 15 pieces that, when assembled, will give them their freedom.
It is called a Seder, or "Order" in English
Generally it occurs only during Passover, a Jewish holiday. There is also a seder for the holiday of Tu Bishvat, but this seder is rarely observed.
The Jews eat the Passover Seder meal on the night of Passover (Pesach). It makes little difference whether Passover begins on Shabbat or on a weekday. Note that there are festive meals on every Shabbat, but they are not called "seder" and the foods are different.
People eat the Seder meal as part of the Passover celebration. It is a symbolic meal that commemorates and retells the story of the Israelites' liberation from slavery in Egypt, as instructed in the Torah. The meal follows a specific order outlined in the Haggadah, a text that guides the rituals and readings during Passover.
We follow the order of the seder as outlined in a haggadah (the book that contains the service and story of Passover.
Seder = סדר
The word 'seder' literally means 'order'. During the seder we recount the story of the Exodus which is an integral part of the holiday. Conducting the Seder ceremony is in keeping with the command (Exodus ch.12 and 13) to celebrate the Exodus on the night of Passover and to retell the events.
It is called a Seder, or "order" in English
The word 'seder' is Hebrew for 'order'. The Jewish Seder is the ceremonial meal in Passover, during which, according to a set of ancient customs and text, we recount the Exodus from Egypt.
you can NOT attend a seder meal
There is the Seder plate, or Keharoh, but no one eats off it. It is where all the symbolic food (according to some, not the matza) in placed.
night of passover