This is how the evening sky will look over the next few days.
The Moon will be Full on August 29 (at 18:35 by Universal Time). It passes about 3 degrees north of Neptune only 4 hours later, so it follows that Neptune will take its turn to be “Full” – that is, at opposition – shortly afterwards, on September 1.
No further comment (from me, I mean). I’m confining myself to minimal blog posts until hard work on Astronomical Calendar 2015 is over; will keep you up to date with sky scenes like this. They have become relatively easy as I improve my program for doing them. Notice the latest touch, a bit of glare around the Moon.