How did Passover effect the Jewish faith?

Jewish tradition holds that the Jewish faith originated with Abraham, around the year 2000 BCE. No exact date is known.

In Israel, it lasts seven days, outside of Israel, it last eight days.

In Israel it lasts seven days, and in the diaspora (out of Israel) it lasts eight days.

Jews celebrate passover to remember the time that they were slaves in Egypt. During passover, Jews all over the world re-tell the story of how Jews were slaves in Egypt and how they were freed.

In the Hebrew calender, Passover or Pesach begins on the fifteenth of Nisan. This year (2010) it begins in the evening of March 30th. Either March or April