If the millennium is a restoration of this Genesis creation to its Edenic condition, then it is important that we understand the Genesis account of creation.
There are actually two accounts. One that revolves around the seven days of creation and the other that revolves around Adam and Eve. The first account of creation does not provide us with an exact sequence of when these components were created. On the other hand, the second account does give us a sequential description of the creation of man and the other living creatures.