If you know anything about history, you know that today -- April 19, 2011 -- is a big, big day.
It's the day, of course, that Skynet comes online, thus dooming all of humanity to be thrown into ceaseless warfare against the relentless robot overlords. Fun!
As helpfully explained by the (exhaustingly) comprehensive Terminator wiki:
As a result of temporal interference by Sarah Connor, her son John, Miles Dyson, and the T-800 destroying Cyberdyne headquarters and all backups of the research in 1995, the date for Judgment Day is moved back to here. Skynet is destined to go online a few days earlier on April 19, 2011, at 20:11.
A few hours after going online, Skynet gains self-awareness. Realizing they have a rogue AI on their hands, its operators in the Pentagon attempt to shut it down, so Skynet flips the eff out and launches nuclear weapons and we get all the gnarly nuclear rubble we see at beginning of Terminator 2: Judgement Day*.
We're not the only ones who are psyched about it. A Facebook page is dedicated to celebrating Skynet Become Self-Aware Day tomorrow, with one wag noting on the page, "What do you think all of those Google servers are for, after all?"
In honor of the holiday, we plan to drink heavily while carving NO FATE into a picnic table and showing off our rocked-out biceps. Happy Skynet Becomes Self-Aware Day!
*Technically, the postapocalyptic ruins we see at the beginning of T2 are from a different timeline. Today's holiday is working from canon as established in The Sarah Conner Chronicles. It's just one of the several major headaches that spring up whenever you have a franchise that involves time travel.