"Rainy Days and Mondays" is a 1971 song by The Carpenters, with instrumental backing by L.A. session musicians from the Wrecking Crew, that went to number 2 on the BillboardHot 100 chart and it was the duo's fourth number 1 song on the Adult Contemporary singles chart. However, the song failed to chart in the United Kingdom until it went to number 63 in a reissue there in 1993. "Rainy Days and Mondays" was certified Gold by the RIAA
The song was composed in 1971 by the then-fairly unknown composers Roger Nichols and Paul Williams. It was released as the first track on the album Carpenters, popularly known as the Tan Album, and the B-side on the single is "Saturday", written and sung by Richard Carpenter.