I'm up way too late, having gotten happily mixed up in some heavy-duty website revisions (see the new Tassava.com home page). A minute ago, I looked away from the computer monitor and noted that it was inordinately bright outside. When I went closer to the window, I could see that the nearly-full moon was illuminating the cloud cover, making the sky glow a deep but unmistakable blue.
We don't get the midnight sun here in Northfield, but this is not a bad substitute.