Coming seven weeks (50 days) after Passover, Shavuot marks the anniversary of the giving of the Torah at Mount Sinai, as well as the end of the grain harvest in ancient times. Shavuot is one of the shalosh regalim, the three pilgrimage festivals which include Shavuot, Sukkot, and Passover. Many Jewish communities celebrate Shavuot by staying up late into the night learning Torah and eating (sweet) dairy foods.