I'm using a MacBook Pro with Catalina 10.15.7 and keyboard is set to UK English.
I made a folder, mytest on Desktop, and the file test.html with CSS.
The character in question is https://www.compart.com/en/unicode/U+002F
I can use the character in HTML with no problems, but for filenames it's a bit more of a problem.
It's a test file, so not for public viewing or usage and wouldn't be in production files anyway.
I've done some light Google-ing, but would appreciate the help as I'm not sure; the only reason for this is simply to learn a bit more about something that I've learnt in HTML (characters / unicode).
Can I name a file with the unicode solidus with the name test/mytest/2021.html ?