So I am, technically, professional middle class.
BUT … I am not blind to the bullshit of everyday life sooooo …
Fridays have become my “I'm available … IF … YOU … 'need' me.” day.
What this means for me is, I don't do any work or create any work for others on Friday's unless absolutely necessary.
Have an emergency and need my help? Yes, I am available to support you dear co-worker.
Need to meet to discuss something? … Monday.
Requires a meeting to resolve? … Next week.
Do I need that report today? … Nope, get it to me Monday.
I can't make my company adopt a 4 day week, but I can help create an environment where a 4 day week is the “unofficial” norm until it becomes official.