In my part of the world it will probably be a bit chilly - maybe some snow on the ground. A typical day in the mid-west in other words.
Seriously, read scripture. Jesus so so so clearly said no one, no man, no one knows the day or the hour of his return. No.One. Not the Mayans, not me, not you. No.one.
Wishing you well.
What will happen?
Easy, that's the Winter Solstice. The day will be the shortest one of the year and starting the next morning every day will get longer until June 21st - the longest day of the year.
What the fear mongers aren't telling you, aside from the fact that fear sells papers, books, movies and television ad slots, is that the Myan calendar is based on cycles. Asking what happens when one runs to the end is akin to asking what happens when the hands on a clock reach 11:59:59.