> I'm getting an eternal spinner

At first I thought this was some form of existential dread stemming from seeing the date of your death :)

I got that when I accidentally entered the month as a number. When I refreshed and used the drop-down to select the month, it loaded immediately.

I’m not even getting a spinner.

Yeah it's very buggy, same thing is happening for me

Same here on both Chromium and Firefox, even with uBlock and Pi-hole disabled. Seems to be the site.