Souls are a part of God, and God existed before the creation of all universes.

That means at our soul level, we all witnessed along with God the creation of this universe. Our human minds just don't remember by design, or more accurately our human consciousness is not expanded enough to access that knowledge stored in our DNA.

And using Earth years to denote how long something existed, especially pertaining to the grand universe, is only relevant and useful to us here in this solar system and no one else.

As everything orbits around the center of the universe at a constant rate, it is far more universal to use number of orbits around the center of the universe rather than to use the number of times Earth orbits around our Sun as a time reference.

It is why the more aware ancients were so keen on observing the cosmos. They know.