WubTheCaptain
https://help.vrchat.com/hc/en-us/articles/1500002248601-I-d-like-to-change-my-name
At the top it says:
> Changing your display name can be done at most once per 90 days. This policy may change at any time with no notification. [...]
Then there's an outdated screenshot showing a Support Agent with a tip that the reader may never get their original name back, and the display name may only be changed "every 3 months"; this tip is absent from the live version.
And below it says:
> You may only change your display name once per 90 days.
And below that:
> Again, please remember that you may only change your name once in 90 days. This limit cannot be overridden, so be careful when changing your name!
I'm looking at my Account Settings at VRChat Home website as a VRC+ subscriber, and it tells me I can change my name once per 30 days, instead of 90 days.
The information about 30 days should probably be added or changed in that Help Desk article.