bankers' hours

Etymology
From the traditional opening hours of banks in the 1800s, and in some parts of the United States, maintained until the 1960s.

Noun

 * 1)  The time period between 10 a.m. and 3 p.m. of a weekday (corresponding to a late start, an early quit, and no weekend work).
 * 2)   Any easy job, especially one with a short working day.
 * 1)   Any easy job, especially one with a short working day.
 * 1)   Any easy job, especially one with a short working day.