I like the Swiss implementation of this. A manager _can_ contact an employee on a Sunday, but then the employee is immediately on weekend-rate overtime even if they just got an email with "deal with this next week". So, many companies have systems that hold back e-mail sent outside of working hours until the next working day unless specially authorised and costed.
Never underestimate an economics-based solution to a legal problem, a.k.a. "if you really want to ban it, tax it".
Never underestimate an economics-based solution to a legal problem, a.k.a. "if you really want to ban it, tax it".