In reality, there's no actual apocalypse coming:
http://www.nasa.gov/topics/earth/feature...
But assuming you already knew that (based on your use of quotation marks), there seems to be a wide range of estimates for when the various conspiracy theories predict the world to end tomorrow. I saw some saying 9PM in Australia, others saying 11PM EST, etc. For the sake of a party or a Facebook post, I'd go with midnight at the start or end of 12/21, personally.
One is delighted to be able to assure you the world never was going to end It was an hoax.I understand these things and if you had read my answers you would have known.
On the last minute of our lives
At midnight tonight
*going to
we are not
