swing shift

noun2

1. •
   (US) A work shift between a day shift and a night shift, such as from 4PM to midnight, and the group of workers scheduled to work such a shift at a facility.
2. •
   (US) A system of shifts where each worker alternates between day shifts and night shifts.

   • We worked the swing shift. One week on days, one week on afternoons and one week on midnights — 2010