 Knight also collaborated with The Carpenters on their two Christmas Special Television Shows in 1977 and 1978, for which he was the principal arranger.On the special edition CD of the music from these two shows, Peter arranged three of the extended medleys and ten of the single charts.Knight also wrote arrangements for the King's Singers, including the Airwave song "You are the New Day", now a best-selling title in the USA.