Passover, also known as Pesach, is a Jewish holiday that lasts for eight days. The holiday begins on the 15th day of the Hebrew month of Nissan and typically falls in March or April on the Gregorian calendar. The exact dates can vary from year to year, as the Hebrew calendar is based on a lunar cycle.

The first two nights of Passover are the most significant, known as Seder nights. During these nights, families and friends gather to retell the story of the Jewish people's exodus from Egypt and to eat traditional foods such as matzah (unleavened bread) and bitter herbs.

The remaining six days of Passover are also observed with special dietary restrictions. During this time, Jews refrain from eating leavened bread and instead eat matzah to commemorate the unleavened bread that the Israelites ate during their exodus from Egypt.

In addition to the dietary restrictions, Passover also involves the removal of chametz (leavened products) from one's home. This is done through a thorough cleaning and search for any chametz that may have been left behind.

Passover is one of the most widely observed Jewish holidays, and its length and traditions are deeply rooted in Jewish history and culture.