Shavuot (Hebrew: weeks) is a Jewish holiday observed 49 days after Passover, on the 6th of Sivan. It marks the giving of the Torah to Moses at Mount Sinai and also celebrates the spring wheat harvest. Traditions include all-night Torah study, synagogue services decorated with flowers and plants, and eating dairy foods.
Shavuot falls on the 6th of Sivan, exactly 50 days (7 weeks) after the second day of Passover.
Shavuot commemorates the giving of the Torah to Moses and the Israelites at Mount Sinai.
One explanation is that before receiving the Torah's dietary laws, the Israelites had not yet set up separate meat and dairy utensils, so they ate dairy foods.
Many Jewish communities study Torah through the entire night of Shavuot (Tikkun Leil Shavuot), preparing spiritually to receive the Torah again.