The key to understanding the restart date of the Maya calendar is the astronomy that will unfold in the sky over the Maya on that special day - and only on that day. This is shown in the above screenshot. Here we see that the sun will be in the middle of the dark rift, the Maya birth canal, on the day of the winter solstice. This was seen by the Maya as the sacred triple rebirth of the sun, which I believe is a timeless metaphor pointing to a very deep spiritual rebirth.
We also see that there are four planets forming the horizontal crossbar of the sacred tree and the sun is virtually exactly in the middle of these planets. This is also quite significant as to why the Maya picked this exact day to restart their calendar. Yet there is nothing to fear; we are not going to fall into a black hole or be inundated with a high level of cosmic rays. As far as Mother Nature goes, it will be business as usual.
But let's not lose sight of how rare this event is or how difficult it was to create a calendar so precisely tuned to this astronomy. Please note:
1) If the Maya intentionally pinpointed the exact day of the winter solstice in 2012 from over 2,000 years ago, they would have needed to know the length of the year to within 45 seconds!
2) Five cycles of their Long Count calendar add up to the length of the earth's precessional cycle to within one-half of one percent and the Maya often talk about all five cycles!
