According to the "Adam and Eve story", full edtion, it's not every 6000 years. In order for it to happen, gravity needs to decline. This happens when the magnetic field of Earth declines dramatically. This in turns happen when Earth enter during it's voyage in the galaxy, into something called a "magnetic null zone". This is a real thing in physics, there are magnetic null zones in between magnetic fields cancelling each other for example at a specific point in space.
, and when it happens the magma that is being kepts under the mantle is less pushed towards the earth core, and expands. When it happens all continents breaks free, even apart actually and do not stay in place due to higher fluidity of the magma. So because the poles are heavy masses of water that is solid (ICE) the rotation makes the poles move towards the equator, and when it happens in a short period of time. The atmosphere and the sea that were still rotating in the previous position are basically hitting the land masses at 1666 km/h per hour. That's why even Mammoth were pulverised and all their bones crushed (which scientists have problems to explain, they said humans when colonizing America did it)
So fyi the future north pole will be in the Bay of Bengal. Europe will have tropical and equatorial climate and Antartica will have mild climate and will be in the middle of Atlantic.