I suppose whenever that day does come up, I'm sure you'll enjoy a good breakfast, maybe a lunch and dinner.
The world will go on. There will be a 2013, 14 etc etc...
Only God knows the last day. No human on Earth, not even the Son of God knows the last day. So rest easy.
For fun; I guess; this site has a countdown. I'll miss it though, as I'll be asleep. It'd be after 4 am when this hits 0. http://december212012.com/
Oh well, if I remember, I'll check the website tomorrow morning to see what it has to say.