[jen729w]

A forward slash is a very common separator character.

I did this myself the other week. Mac user. Folder was called ‘Lessons/episodes’ from memory. I only noticed it was weird when my Synology didn’t display the character. Renamed to ‘Lessons & episodes’.

[sofixa]

It absolutely is. That doesn't mean that 90% of the world population use forward slashes for dates.