When was the 12 days of Christmas written?

Fred Silver wrote the song and sold it to Carol Burnette. Fred Silver was born in Brooklyn in March 1936. He started playing the piano at age 2. He had a Bachelor of Music degree from Boston University and a Bachelor of Science and a Master of Science degree from Julliard School of Music. Fred was the first recipient of the Rodgers and Hammerstein award given to a composer for the musical theater. He was a Steinway Artist and won the Freschl Song award for "Cradle Song". He has written 8 musicals and 120 Choral pieces. He was the author of, "Auditioning for the Musical Theater".