Oh, I completely understand the idea of time being relative from an Einstein point of view, just don't see how it relates to the creation of the earth. If you find it, let me know! Be careful though, your twin example and your Mars example are two very different things. One is a physics concept and the other is just a definition game. True humans have defined the word "day" to mean one earth rotation, but time passes at the same speed on both Earth, Mars, or anywhere else irregardless of what we call it.
Anyways, off to bed