all in a day's work

1. Also, all in the day's work. Expected and normal, as in He said I had to finish these reports by five o'clock—all in the day's work. This phrase is sometimes used as an ironic comment on an unpleasant but not abnormal situation. The expression possibly alludes to the nautical term day's work, defined in 1789 as the reckoning of a ship's course during the 24 hours from noon to noon. [c. 1800]

Example Sentences

"Ronnie was very gracious about it considering... but as far as he was concerned as a professional in the movie industry it was all in a day's work," said Powell.

From BBC

What was the nature of the moral collapse that turned this horror into a normality for the Nazis who ran these camps, a normality in which mass murder became, for them, all in a day's work?

From BBC

“He made this unimaginable sound, he was screaming so horribly. But then finally he stopped. This was all in a day’s work for the surgeons, but it really left an impression on me because it was my first time.”

From New York Times

"You push Cyd, Roman knifes Gerri, all in a day's work!"

From Salon

"When the bombs fell, she would just dive under the table or sleep under the bed - all in a day's work."

From BBC