In the Hebrew Bible, Passover is one of three pilgrimage festivals.
The three festivals are Passover, Shavuot and Sukkot. They are called the Shalosh Regalim, or Three Pilgrimage Festivals, because the Torah describes Israelites traveling to Jerusalem to worship and bring offerings at the Temple. Passover commemorates the Exodus from Egypt and occurs in the spring; Shavuot follows seven weeks later, and Sukkot takes place in the autumn.
The festivals also connect religious observance with agriculture in the Land of Israel. Passover coincides with the barley harvest, Shavuot with the wheat harvest, and Sukkot with the completion of the fruit harvest. Their timing helped unite biblical history, seasonal work and Temple worship.
The destruction of the Second Temple ended the ancient national pilgrimage system as an obligation in practice, but the festivals remain central Jewish observances. Modern worship preserves many related readings and prayers, and some pilgrims visit the Western Wall in Jerusalem as a symbolic continuation.
A common mistake is counting the High Holy Days or all major Jewish holidays together. The biblical pilgrimage classification specifically names three festivals, not seven, four or two.