day in, day out

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day in, day out

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

   Synonym: day after day

   Even if you like peanut butter sandwiches, eating the same sandwiches day in, day out will get old.

   • 2022 January 26, John Crosse, “When the tide turned to a safer railway...”, in RAIL, number 949, page 52:

     There were derailments happening day in and day out, due in part to 'shunting mishaps' but more frequently involving wagons in freight trains due to a combination of poor track and speed.

• week in, week out
• year in, year out
• night in, night out
• month in, month out