Related Clues:
- Noon to noon
- Like zebra crossings
- Appointment-calendar page, perhaps
- Word with trip or light
- "Let's call it a ___"
- Week component
- Every second from a diary unit?
- Square on a calendar
- Desk-calendar page
- Quaint lodging hinted at by the outsides of 18-, 20-, 28-, 42-, 51- or 55-Across
- One of seven in a week
- Generally preferred work shift
- Light interval
- Midnight to midnight
- One revolution