Day Off is a day you are not required to work. Can be a Saturday or Sunday generally... but sometimes you can take a day off during the middle of the week and have a "day off" then. Yes, you can say 3 days off but dont use "-" cheers

Time off from work.

它的意思是休息日。I have 3 days off 就是‘我有三天假’的意思 我觉得这个词很有用啊

A day-off is when you don't have to work, a day off work. "Is it your day off tomorrow?". Yes to " Is "3 days-off" right?"