rather than worry about a date change on some dusty old calender, there are dozens of other far more likely things that could kill us all within the next few years or decades... such as:
-nanotech gone awry and killing us all...
-genetic engineering gone awry killing us all...
-humans invent the singularity and it kills us all...
-world war 3 starting in the middle east and killing us all...
-shoddy chinese nuclear power plant construction fails killing us all...
-giant meteor impact kills us all...
-terrorist release powerful biological weapons killing us all...
-mutant crop blight wiping out most of the food supply killing most of us...
-a black hole swallows our planet killing us all...
-logging in the remote rain forest unleashes a new virus/disease killing us all...
-rampant global warming causes a series of hypercanes killing us all...
-freak solar flares kill us all...
-Chuck Norris getting pissed off and killing us all...
but why worry about all that shit?
just chill, smoke a joint and be happy