But wait -- there was no full moon on the 23rd of September (which was the equinox). True, and well-observed. I actually took this photograph in full sun at mid-day. Shooting directly into the sunlight caused the silhouetting, which I increased somewhat in post. It didn't take a lot of processing -mostly I increased the contrast in the sky, and the result is quite satisfyingly dramatic. Day for night, Spring for Autumn. It's all about what it evokes.