History. all in a day's work definition: 1. Learn more. Though the spirit of the proverb had been expressed previously, the modern saying appeared first in James Howell's Proverbs in English, Italian, French and Spanish … See also: all, work all in a day's work all in a day's work 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. We all know that the more you move throughout the day, the better.
It means that without time off from work, a person becomes both bored and boring.
The exact origins of the phrase remain unclear, though it was recorded as early as 1659. If something difficult, unpleasant, or strange is all in a day's work for someone, it is a usual…. All work and no play makes Jack a dull boy" is a proverb.