No, it isn't the Apocalypse (at least as far as i know), so there's not an everything-must-go sale on the contents of the material world going on today. But it is the end of a popular store in Rogers Park.
RIP Evil Squirrel Comics. I have to confess that i never shopped there, but it seemed like a real haven for comic lovers. The "last day" referred to in the sign was actually Sunday, so don't go racing to the RP to get a last-minute deal on a Wonder Woman action figure. Evil Squirrel is apparently still in business, but without a physical store, so check out their website.