Younger Than Yesterday is the fourth album by the American rock band The Byrds and was released in February 1967 on Columbia Records (see 1967 in music). The album saw the band continuing to integrate elements of psychedelic rock into their music, a process they had begun on their previous LP. In addition, the album captured the band experimenting with new musical textures, including brass instruments and reverse tape effects. It also marked the emergence of the band's bass player, Chris Hillman, as the group's third songwriter. Two of Hillman's compositions on Younger Than Yesterday exhibited country and western influences and thus, can be seen as early indicators of the country rock direction the band would pursue on their later albums. The title of Younger Than Yesterday is derived from the lyrics of "My Back Pages", a song written by Bob Dylan which was covered on the album.
Younger Than Yesterday peaked at #24 on the Billboard Top LPs chart and reached #37 on the UK Albums Chart. A preceding single, "So You Want to Be a Rock 'n' Roll Star", was released in January 1967 and reached the Top 30 of the Billboard Hot 100. Two additional singles taken from the album, "My Back Pages"