Well things are always happening, but if you mean the end of the world? Try showing her a 2012 calendar, and how after Dec 31 the Calender ends, just like any other other calendar does on any given year. Remind her every time her calendar in the past ended the world went on. She just needed to get a new calendar. Now explain to her that when the Mayans made their calendar they couldn't make one that lasted forever, periodically it needs to be updated. Just like the calendar on the wall needs to be updated, so does the Mayan calendar. I seriously didn't think anyone actually bought into that nonsense. Are you joking?
This is the answer I give on Ask.com. It explains how the stories of the "end of the world in December, 2012, got started.
The Mayans had a very detailed system for calculating time and the positions of stars in the local universe. Their calendars (carved in stone) predicted that our planetary system would align in some way (not an astronomer; don't know the details) with the center of our galaxy. Astronomers checked with their computers and were amazed to find that the Mayans had been correct. There will be an alignment and it only happens every 5,125 years. THIS is what made the news, that the Mayans had been able figure this out. The Mayans did not predict the end of the world, but many people who didn't really read the news blew it all out of proportion. The world could end in December; it could end in 30 seconds (both extremely unlikely). It's just a case of people blowing a simple news story on archeology (of all things) way out of proportion. I know; that's a lot. But I thought someone should give the REAL explanation of the 2012 nuttiness.