Complex sentence: At the time of the song's release, the most recent Year of the Rabbit had been 11 February 1975 to 30 January 1976; thus, the song was recorded in the Vietnamese Year of the Cat.
Split into simpler sentences: At the time of the song's release, the most recent Year of the Rabbit had been 11 February 1975 to 30 January 1976. Thus, the song was recorded in the Vietnamese Year of the Cat.