The Stack Exchange Data Explorer is updated every Sunday morning; the first sites are already finished by 3am UTC. However, today this doesn't seem to happen; all I can find is posts from May 30th and older.

I thought by now I'd know all features of the Stack Exchange Data Explorer but apparently I don't. This is what I do: Click the Compose Query button on the home page. Paste SELECT MAX(CreationDate) FROM Posts into the editor and click Run Query Click the 'permalink' option. This will take you...