Okay, so once again, it was a dud. It reminds me one spectacular End Of The World party the moonist sect had in Korea, I think in 1998 - thousands of followers gathered on a large stadium, awaiting The End with their Guru, and in the end, he just said:
"Sorry, nothing has happened, let's go home."
Epic.
However, I now know why the world did not end - because I finished Assassin's Creed 3 in time, hehe