After running into town to get flowers (Guy flowers, okay? The kind that go on your lapel.) that he totally didn't forget until the last minute, Xander arrived back at 406 to find that his date? Already there. Though not already dressed. In prom clothes, that is. He was dressed in regular clothes omg, jeez - the roomie was there, after all!
Yuh-huh. Have you met a Tuesday in Xander's life when anything happened besides History of Art? Though granted stuff happened in History of Art. If by stuff you mean e-mail....like... Xander was totally supposed to be checking in History of Art, yeah.