It's
Blog Against Disableism Day. There are lots of good posts -- quite a few around invisible disabilities.
But a couple of my favorites are:
this one about accessibility and accommodation, and
this one about the frustrations of dealing with people who assume that just because you don't need [their] help with something that they think you should, that you therefore don't need help or accommodation with anything.
And this one about teaching and explaining and justifying oneself.