No, no, you've got things right! If you're going to spread fear and panic, you only tell part of the facts! Like this:
In 2012, the Mayan calender ENDS. That's right, time runs out on Dec. 21, 2012. ALSO, the sun will be aligned with the center of the Milky Way for the first time in about 26,000 years on the same day, which marks the winter solstice. THE END IS NEAR!!
See, my version is much more alarmist.
There's actually a pretty good site put up by NASA because they were so inundated with people in a panic over 2012:
http://www.nasa.gov/topics/earth/features/2012.html