Day-or-night definition

The cliff's sheer drop created a natural defense against any intruders in addition to providing a view that was breathtaking by day or night.

A senior obstetrician must be available, day or night in most obstetric units.

Short-Eared owls are active at any time of day or night.

In order to support himself and pay his academic fees many a Japanese has to fall into the ranks of the physical laborer during a part of each day or night.

For purposes of personal service of writs, it means any time of the day or night on week-days, but excludes the time from twelve midnight on Saturday till twelve midnight on Sunday.