Johann Sebastian Bach’s cantata BWV 63, “Christen, ätzet diesen Tag,” was composed for an initial performance on Christmas Day 1714 or 1715. Here a 1995 performance by the New London Consort (Catherine Bott, soprano; Christopher Robson, controtenore; Andrew King, tenore; Paul Agnew, tenore; Michael George basso) under the direction of Philip Pickett. An English translation of the text is available here, the German original, probably by Johann Michael Heineccius, is available here