There are stellar objects we can see that are in the millions of light years from us (the Andromeda galaxy, for example). This means that the universe has to have been in existence for, at a bare minimum, the time it would take for the light to travel from its point of origin to the Earth. There’s even evidence of objects a couple billion light years away.
So, this would mean that, if the creationists are correct, there were other galaxies and stars formed for billions upon billions of years before Earth snapped into existence. Sort of a strange thought.