Keep (some kind of) hours American British verb phrase
1. Used to indicate one who keeps a consistent pattern or timetable of awakening and sleeping.
Although he experienced jet lag, Jane has tried to keep strange hours since arriving in Korea.
It is of importance to keep regular hours for kids. If not, they can suffer a lot of problems with sleep.
My friends are night owls who naturally keep late hours to do everything.
2. Used when one keeps a particular work schedule.
Our company requires all employees to keep regular hours, even on extra shifts.
This shop's owners always keep irregular hours so I hardly meet him.
The verb "keep" should be conjugated according to its tense.