keep good hours—get up and go to bed early:
- As a rule they keep good hours, but most of them will read an hour or two before going to sleep.
keep good time—
1. (of a clock or watch) show the hour correctly:
- The clock is in good working order, keeping good time.
2. be habitually punctual:
- She keeps good time, is prepared for work and, above all, is a responsible person.
3. (Music) follow the rhythm correctly:
- Drummer Farnsworth doesn’t try to compete with the rumble of Earland’s organ; instead, he keeps good time.