Today is 12/12/12 and this is being posted at exactly 12:12:12 a.m. Eastern Standard Time. You have exactly twelve hours to prepare for the final celebration at 12:12:12 p.m. (A few more if you're in a later time zone.)
After that, the party's over.
Even if the apocalypse weren't scheduled for nine days from now, this would be the last date for nearly a millennium that we would see a day/month/year repeating date. (The next one on the calendar is either January 1, 3001 or October 10, 3010, depending on how strict you are about zeroes.)
So, really, let loose today, and at twelve past noon (give or take a few seconds) party like you've got nothing to lose. You only live on 12/12/12 once, baby!