I have travelled across the desert and bring news on whether it's possible to visit Raseir early. (in case the below screenshots are dead links, I also uploaded the screenshots here.
Here, we're standing outside Raseir, not Shapeir. You can tell because of the constellations.Exhibit A-2
Proof that the current day is 16, long before you're supposed to be in Raseir.Exhibit B
We attempt to enter, and are met with the familiar hostility of the Raseirian guard.Exhibit C
Being a crafty hero, we try something a little different...Exhibit D
Hmm, nope, they ain't buying it.Exhibit E
Oh well, we tried. We end up back at the town outlook.
So, in conclusion: Yes, it's possible to visit Raseir early in the VGA remake.