Passover begins at sundown
To our Jewish friends, Chag Pesach kasher vesame’ach, or “May you have a kosher and joyous Passover.”
The eight-day festival of Passover is celebrated in the early spring, from the 15th through the 22nd of the Hebrew month of Nissan. Passover (Pesach) commemorates the emancipation of the Israelites from slavery in ancient Egypt. Pesach is observed by avoiding leaven and highlighted by the Seder meals that include four cups of wine, eating matzah and bitter herbs, and retelling the story of the Exodus.
In Hebrew it is known as Pesach (which means “to pass over”), because the Lord passed over the Jewish homes when killing the Egyptian firstborn on the very first Passover eve.
See https://www.chabad.org/ for more information.