In the narrative of Exodus, the Bible tells that God inflicted ten plagues upon the Egyptians before Pharaoh would release his Hebrew slaves, with the tenth plague being the killing of every firstborn male, from the Pharaoh's son to the firstborn of the dungeon captive, to the firstborn of cattle. The Hebrew was instructed to mark the doorposts of their homes with the blood of a spring lamb and, upon seeing this, the spirit of the Lord passed over these homes, hence the term "passover". Passover begins on the 15th day of the month of Nisan, which is spring in the Northern Hemisphere, and is celebrated for seven or eight days. It is one of the most widely observed Jewish holidays, and is commemorated by affiliated and nonaffiliated Jews alike as a time to contemplate the endurance of the Jewish people throughout history.
Today, Pesah is day for the Jewish people to remember the past, recite their suffering and celebrate freedom thanks to God.The most important event at Pesah is the seder which is held at home on the first two nights of Pesah. People would eat a variety of symbolic foods and read Haggadah to review the history of how the ancient Israelites were freed from slavery in Egypt.