grrrck, I did that thing where I tried to write a blog post and ended up writing a #QuartoPub extension. As one does.
And then I wrote a blog post about the extension instead of the blog post about the other thing. Oh and I also didn't finish the draft blog post I've been sitting on for 5 months, either.
But hey, here's a neat Quarto shortcode for adding a date anywhere in your blog or document or whatnot!