Complex sentence: Staff worked a six-day week, rotating through the three shifts: 4pm to midnight, midnight to 8am (the most disliked shift), and 8am to 4pm, each with a half-hour meal break.
Split into simpler sentences: Staff worked a six-day week, rotating through the three shifts. These were from 4 pm to midnight, midnight to 8 am (the most disliked shift), and 8 am to 4 pm, with a half-hour meal break.