Interesting observation :) I guess I will look into that thanks for your reply.
If I spoke of miles and another spoke kilometers, part of what we refer to would match, but not all. Specifically, the numbers are not completely comparable.
Likewise, when science and the world consider time, they speak in one language, but God and those who are God's, speak in another. The world does not understand the two languages, but we understand: Both languages tell of what is manifest in the world, whether it is good or evil. So then, what is good is of God and true, but what is evil is not true, but the manifestation of a lie. Therefore, if the world sees the manifestation of the lie of the earth being millions of years old, then it is a true manifestation, but a lie all the same. The same is true of a lie that is spoke. If I quote a lie, the words are true, but the lie is not.
By this same measure, what is manifest of God is in God's spiritual language, but confused with every language of the world, even in the scriptures, which occurred at the tower of Babel. Thus, the scriptures are foolishness to the world, and must be discerned spiritually.
The word "millennium" is no different.