There are two kinds of pole shift. One kind is the magnetic field, and that seems to have happened many times and is happening now. The other is more or less catastrophic and involves either earth’s crust or the whole planet tipping over. That might have happened as recently as 12,000 years ago and be a regular event.
That Mayan Long Count is not that long. Something like 5125 years.
[planet tipping over]
“Daddy!!..Daddy!! that man said we are all going to fall off the world”