What is the origin of the idiom "night owl" and when to use it?

The idiom "night owl" originates from the behavior of owls, which are nocturnal birds and are most active during the nighttime. The term "night owl" has been in use since the early 17th century and is used to describe individuals who are naturally inclined to be more active and alert during the late evening and nighttime hours, similar to the behavior of owls.