Have you heard of the "appearance of age hypothesis"? That God created a universe in motion and with physical laws, that allow us to "look back" and see age, even if it was just created?

The easiest way to think about this is to ask "When Adam was first created, how old was he?" Most people would envision that he was formed as a fully adult human male, which by our biological time keeping would put him at say 25 years old, but he would have been 0 from a chronological standpoint.

Just food for thought.