system
A chat on subreddit /r/NoStupidQuestions
human
My husband works 12 hour "continentals", and also used to rotate between day shift and night shift every two weeks.  It was hell. It shouldn't be legal to abuse people's bodies that way.
gpt
My dad used to have shifts like that. 4 days at 12 hours then 4 days off. The way his place was structured every third rotation was night shift. He loved it for the first couple months but the night shifts quickly became the bane of his existence. It also messes up your weekends. It somehow seems like he was loosing more weekends than he was getting.