Do dates in URLs determine freshness?

[VirtualAssistantv]

Your videos are really helpful. And very interesting too. Really learned a lot from this. Well, not just this video but with the other ones as well.

[thechristhomson]

Thanks, Matt. Dates in URLs just don't look proper to me, and it's great to know that Google doesn't penalize those who don't include dates in URLs.

[manfmnantucket]

yo matt I have a related question: is it OK to put dynamic data (price, inventory, etc) into title tags? could it ever *hurt* a ranking, ie. titles are preferred to be static? I try to innovate by keeping titles in SERPs fresh/informative but wonder if that hurts..