"Day-In Day-Out" is a song recorded by English singer David Bowie, serving as the opening track for his seventeenth studio album, Never Let Me Down (1987).
It was issued as a single on 23 March 1987 ahead of the record's release. The recording was solely written by Bowie, while production was handled by him along with David Richards. An R&B track, "Day-In Day-Out" criticizes the treatment of the homeless in the United States at that time, and deals with the depths to which a young mother sinks to feed her child.
An accompanying music video for the single was shot in 1987, being banned by some stations as a result of its content, although it was still nominated for a 1987 MTV Video Music award in the category of "Best Male Video". Commercially, "Day-In Day-Out" was the most successful single from Never Let Me Down, peaking at number 17 in the United Kingdom as well as charting within the top 40 in several other countries.
A re-engineered version of the song that includes Bowie's original vocals, some original and new instrumentation, and new mastering was released in 2018 as part of the album Never Let Me Down 2018, part of the Loving the Alien (1983–1988) box set.