Here's an easy illustration to understand what the "wobble"
part is.... a lot of people don't get that part when you try
to explain it.

That the answer to this question is primarily astronomical in nature is supported by two important clues. First, the calendar restarts on the winter solstice, an astronomical event. Second, the overall length of the calendar is related to the precession of the earth, another astronomical phenomenon. Precession is the very slow wobble of the earth. Remember, the earth is spinning on its axis and this axis of rotation is tilted. When we observe the direction that this axis is pointing, we see that the entire earth wobbles like a top that is not standing straight up. Again, this is called precession and it takes about 26,000 years for the earth to complete one wobble. By the way, this 26,000-year period is sometimes called “the great year.”
[link to www.grahamhancock.com]


FYI... I don't believe ET created the Mayan calendar....this just happens
to be a good explanation of the 26,000 year cycle.

And I don't believe 12/12/12 is the end.