Translation of "pentecost" into Colognian

A Jewish festival (also known as Shavuot, the Feast of Weeks) seven weeks after the feast of Firstfruits or Yom Habikkurim, originally a harvest festival but, since the destruction of the Temple, also commemorating the anniversary of the giving of the Ten Commandments to Moses and the Israelites at Mount Sinai. [See Wikipedia article on Shavuot for further information on, and chronology of, these feasts.] [..]