The story
Seven weeks (shavuot) after the Exodus the Israelites stood at Mount Sinai and received the Torah; the festival is the anniversary of that day. In the Temple period it was also the festival of the first fruits (bikkurim), when the farmers of Israel walked to Jerusalem with baskets of the seven species, wheat, barley, grapes, figs, pomegranates, olives and dates.
It has no ritual object of its own, no sukkah, no matzah, no shofar, and the customs grew around study and the harvest: staying up all night to learn, greenery in the synagogue, dairy food, and the reading of the Book of Ruth, the story of a convert's loyalty set at the barley harvest.
