Passover begins at sundown on Friday, April 22 and is a holiday celebrated by people of the Orthodox, Reform and secular Jewish faith.
It's not a federal holiday in the United States but some Jewish businesses may be closed for some or all of the Passover period, which is typically eight days.
Passover commemorates the liberation of the Israelites from Egyptian slavery some 3,000 years ago, and is observed with ritualized meals of unleavened bread and wine.
It's often a holiday when people try to ensure that everyone -- especially the elderly, poor or those living alone -- can take part in a seder. Families will open up their homes to others and temples will offer community seders.