Could God on the B-theory account where God exists outside of time know what time it is for us now? 

Even if you say time doesn't exist for us, and it's just an illusion, still God would presumably know what time it is for us in that illusion.

For God to know what time it is now, which he would if he is omniscient, would require him to change constantly. But changing is at odds with the idea that he exists outside of time. I think to exist outside of time means to not change, so a b-theory God does not have changes. So, how can such a God know what time it is now?