Not exactly revolutionary, as I had an HR generalist tell me twenty years ago: "yeah, we all need a mental health day from time to time." when I made some mention that my sick day involved neither sickness nor a doctor visit.
That said, kudos to the parties involved for bringing it out into the open-source and an "approved" rubber stamp from the CEO.
We have something called 'Fuck It' days that allows any member of the team to walk out and have day to get back on track. We have almost unlimited of these (at line manager's discretion) who intervenes if you take too many which indicates an underlying problem. It works for mental health and a whole host of other purposes. For me this is the best perk ever, i have availed it 2 times in the last couple of years, both times it made a marked change to my mental state. It is amazing to get up and go 'fuck it' i am going to movies instead and be able to do it with zero emotional baggage.
Wow that site had a in page pop up that covered the entire page. Seems fitting for a site named "attn".