The song was a pastiche of early 1970s Neil Young because Bowie was listening to a Neil Young record at home on 30 May 1971 when he got the news of the arrival of his son.
Bowie drew inspiration for the song from an early 1970s Neil Young album while at home on May 30th, 1971, which prompted him to create a musical tribute to the artist upon learning about the birth of his son.