Salam Alaykum.
This is a stolen number from Quran, also not accurate, they always talks about billion/million years even Muslims, without proving it. think about it, they can not even and accurately talk about an age of something earthly. even Muslims, mentioning or learning these numbers without asking themselves: how did we reach this numbe
Time is Nothing, Time is attached to Material Energy, space or Place. you miss the place and you miss the time als
I did spend years on this topic, creation, existence, Bigbang they call ( also stolen from Quran but not