Maybe you can hack around it via inspect element or API, but for a few years now through the normal interface tumblr will not let you set a schedule date before the present. You can backdate a post but I'm not sure which timestamp shows up in the default theme (you might need a custom theme)

You used to be able to edit other people's posts when you reblogged them. I only ever used it to correct others' typos, but some very creative evil was done with that function. Those were the days...

Hors d'oeuvre

"Grand unified theory"?

the bar's drink selection at the linguistics dungeon is somewhat limited, they only serve IPAs

I can't believe she really wrote the second verse of Rainbow Dress