What is "day in, day out"

adv. (context idiomatic English) Every day; daily; constantly or continuously; especially, of something that has become routine or monotonous.

"Day In, Day Out" is a popular song with music by Rube Bloom and lyrics by Johnny Mercer and published in 1939.

According to Alec Wilder the song, 56 measures long, has a wonderful, soaring melodic line, free from pretentiousness, but full of passion and intensity which is superbly supported by the lyrics. Although the catch phrase "day in—day out" sounds like a dull routine, Mercer uses exotic images to contrast with the boring sound of the phrase.

"Day In, Day Out" is a song written by Marv Green and Thom McHugh, and recorded by American country music artist David Kersh. It was released in May 1997 as the fourth single from his album Goodnight Sweetheart. The song reached number 11 on the Billboard Hot Country Singles & Tracks chart in September 1997.

Day In, Day Out may refer to:

• "Day In, Day Out" (1939 song), a popular song with music by Rube Bloom and lyrics by Johnny Mercer
• "Day In, Day Out" (David Kersh song), a 1997 song by American country singer David Kersh
• "Day In Day Out" (Feeder song), a 1999 song by British rock band Feeder
• " Day-In Day-Out", a 1987 song by David Bowie