You’ve probably seen weather time-lapses. The actual project is for creating digital solargraphs. A solargraph records the path of the sun across the sky, usually over the course of several weeks or months, on photographic paper. I’ve built a digital version of this, which gives me a few more options for creating things like this website that shows the solargraph for every day. The page is updated around 9:30pm every day with that day’s images.