Pentecost (Ancient Greek: Πεντηκοστή [ἡμέρα], Pentēkostē [hēmera], "the fiftieth [day]") is the Greek name for Shavuot (Hebrew:שבועות‎, lit. "Weeks"), the Feast of Weeks, a prominent feast in the calendar of ancient Israel celebrating the giving of the Law to Moses at Sinai. In Christianity, Pentecost is celebrated fifty days after Easter Sunday, inclusively (i.e., 49 days with the first day counted, seven weeks), hence its name. In Judaism, Shavuot is on the sixth day of the Hebrew month of Sivan (late May or early June). Pentecost falls on the tenth day after Ascension Thursday (which itself is 40 days after Easter).