John´s seventh single outside of the Beatles was written on acoustic guitar, demoed in October 1971 and released as a single in America for that holiday season, on 1 December 1971 — but not in the UK, where a dispute between John and The Beatles‘ publishing company, Northern Songs, delayed it to the extent that it had to wait until 24 November the following year to come out in his home country.
But even in the US, ‘Happy Xmas’ emerged too close to the holidays to get substantial airplay, and barely made the top 40 of the Cashbox singles chart. Billboard, for its part, listed it on its separate Christmas countdown rather than the Hot 100, limiting its profile further even though it reached No. 3.
When the song finally saw UK release, its chart entry on 9 December 1972 was somewhat modest, at No. 23. It climbed to No. 16, but sales really took off in the last chart before the holiday, and it spent the last two weeks of the year at No. 4.
UK chart debut on 9 December 1972: ‘Happy Xmas (War Is Over)’ by (to quote the credit exactly) John & Yoko With The Plastic Ono Band And The Harlem Community Choir.
Like so many Christmas songs, ‘Happy Xmas’ has made many return appearances, most notably in the sad aftermath of John’s death in 1980, when it climbed to No. 2. In its many subsequent chart runs, it last made the top 40 in 2007, at No. 40.