A company I work with was recently acquired by a US company (I'm British). I was quite confused when, in a meeting, all of the Americans suggested that the company should implement mental health days several times a month. My thought was: isn't that what the weekends and holidays are for? It would be quite unusual for British employees to demand mental health days. Perhaps the lack of paid vacation explains the difference (Although, I haven't had a full week off since 2014 because I'm a freelancer, so maybe they have a point).