Shavuot, the “Feast of Weeks,” is celebrated seven weeks after Passover (Pesach). Since the counting of this period (sefirat ha-omer) begins on the second evening of Passover, Shavuot takes place exactly 50 days after the (first) seder. Hence, following the Greek word for “fifty,” Shavuot is also referred to sometimes as Pentecost. Although its origins are to be found in an ancient grain harvest festival, Shavuot has long been identified with the giving of the on Mount Sinai.
