I totally believe in 2012, it's the number that comes before 2013, and the one that comes after 2011! That's about it however. Nostradamus was no prophet in any sense of the word, given the test of a Prophet is that 100% of a Prophets predictions are true, and Nostradamus has never been right. So, that decides it for me.
As for changes happening around the world? That's nothing new when you look back through history. The media, the government, and big business, would all like us to panic and buy their lies so we spend billions on stuff that won't make a difference.
For all our worrying, no one has figured out how to add one day to their lives. The only way scripture says a person can add to their lives is through honoring their parents and thus live a long life. So, live in such a way that you honor your parents, your family, and your friend's, and you will do more for changing the world than anything Nostradamus or the government has to offer.