Passover commences on the 15th of the Hebrew month of Nisan and lasts for either seven days (in Israel or eight days for Orthodox, Hasidic, and most Conservative Jews.The first day of Passover only begins after dusk of the 14th of Nisan and ends at dusk of the 15th day of the month of Nisan. The rituals unique to the Passover celebrations commence with the Passover Seder when the 15th of Nisan has begun. In the Northern Hemisphere Passover takes place in spring as the Torah prescribes it: "in the month of [the] spring" Exodus 23:15). It is one of the most widely observed Jewish holidays
Passover or Pesach is an important, biblically derived Jewish holiday. The Jewish people celebrate Passover as a commemoration of their liberation by God from slavery in Egypt and their freedom as a nation under the leadership of Moses. It commemorates the story of the Exodus as described in the Hebrew Bible especially in the Book of Exodus, in which the Israelites were freed from slavery in Egypt. According to standard biblical chronology, this event would have taken place at about 1300 BCE (AM 2450).
The Seder plate is the focal point of the proceedings on the first (two) night(s) of Passover. Whether it is an ornate silver dish or a humble napkin, it bears the ceremonial foods around which the Seder is based: matzah, the zeroa (shankbone), egg, bitter herbs, charoset paste and karpas vegetable.
Zeroa — Shankbone
Also transliterated Z'roa, it is special as it is the only element of meat on the Seder Plate. A roasted lamb or goat shankbone, chicken wing, or chicken neck; symbolizing the korban Pesach (Passover sacrifice), which was a lamb that was offered in the Temple in Jerusalem, then roasted and eaten as part of the meal on Seder night. Since the destruction of the Temple, the z'roa serves as a visual reminder of the Pesach sacrifice; it is not eaten or handled during the Seder. Vegetarians often substitute a beet, quoting Talmud Pesachim 114b as justification; other vegetarians substitute a sweet potato, allowing a "Paschal yam" to represent the Paschal lamb.
Beitzah — Roasted Hard BoiledEgg
A roasted hard-boiled egg, symbolizing the korban chagigah (festival sacrifice) that was offered in the Temple in Jerusalem and roasted and eaten as part of the meal on Seder night. Although both the Pesach sacrifice and the chagigah were meat offerings, the chagigah is commemorated by an egg, a symbol of mourning (as eggs are the first thing served to mourners after a funeral), evoking the idea of mourning over the destruction of the Temple and our inability to offer any kind of sacrifices in honor of the Pesach holiday. Since the destruction of the Temple, the beitzah serves as a visual reminder of the chagigah; it is not used during the formal part of the seder, but some people eat a regular hard-boiled egg dipped in saltwater as the first course of the meal
Maror — Bitter herbs
Bitter herbs symbolizing the bitterness and harshness of the slavery the Hebrews endured in Egypt. In Ashkenazi tradition, either horseradish or romaine lettuce may be eaten in the fulfillment of the mitzvah of eating bitter herbs during the Seder. Sephardic Jews often use curly parsley, green onion, or celery leaves.
Charoset — A sweet, brown mixture of foods
A sweet, brown mixture representing the mortar used by the Hebrew slaves to build the storehouses or pyramids of Egypt. In Ashkenazi Jewish homes, Charoset is traditionally made from chopped nuts, grated apples, cinnamon, and sweet red wine
Karpas — A vegetable
A vegetable other than bitter herbs, which is dipped into salt water at the beginning of the Seder. Parsley, celery or boiled potato is usually used. The dipping of a simple vegetable into salt water, and the resulting dripping of water off of said vegetables visually represents tears and is a symbolic reminder of the pain felt by the Hebrew slaves in Egypt. Usually in a Shabbat or holiday meal, the first thing to be eaten after the kiddush over wine is bread. At the Seder table, however, the first thing to be eaten after the kiddush is a vegetable. This leads immediately to the recital of the famous question, Ma Nishtana — "Why is this night different from all other nights?" It also symbolizes the spring time, because Jews celebrate Passover in the spring.