To see a table of some important events in Jewish history discussed on this website and their various dates deduced from traditional Jewish sources, the modern Hebrew/Jewish calendar, and secular historical timelines, check out our Jewish History Timeline web page.Our nation was historically called Israelites or Hebrews.
Additionally, over this 19-year cycle, a second month of "Adar" called "Adar II" was and is added in the 3rd, 6th, 8th, 11th, 14th, 17th and 19th years of the cycle, meaning in those years the month of Adar is replaced with the months of Adar I and Adar II.
The leap year for Adar is 30 days and in non-leap years, Adar has 29 days.
It shall be the first month of the year." Therefore, it was based on these words that the Passover / Pesach celebration was to be held in the first month of the Hebrew year. Why Does Pesach / Passover Start On The 15th Of Nissan And Last Until The 22nd Of Nissan? Exodus in the Passover story again states the words of G-d to Moses: "In the first month, from the fourteenth day of the month at evening you shall eat unleavened bread until the twenty-first day of the month at evening".
This month was named Nissan by the biblical Ezra and Nehemiah after they and other Hebrews returned from exile in Babylonia to Jerusalem following the Persian conquest of Babylonia in 539 B. Since the Jewish day begins at sundown and ends at sundown, this "commandment" or "mitzvah" from G-d is interpreted to mean that the 14th day "at evening" means "after sundown" and hence the start of the 15th day of Nissan.
Similarly, the twenty-first day "at evening" also is interpreted as "after sundown" and hence, the 22nd day of Nissan. The following is a list of the future dates of Passover / Pesach.