One of the mysteries of the English language finally explained.
1The work of a day; (an amount of) work done on or appropriate to a day.
2"all in a (also his, the,etc.) day's work": (of a task, experience, etc.) accepted or expected as part of a person's normal duty or routine. Often used ironically.
3Agriculture. As a unit of area: = "daywork". Now historical.
Old English. From the genitive of day + work.
day's work/deɪz ˈwəːk/
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