Eirik Solheim has been making videos documenting the changing of seasons since 2005. Over the past year, he glued a Canon 400D camera with an EF-S 10-22mm lens to a shelf, and had it shoot one photograph every 30 minutes of the scene outside. By the end of the year, he had over 16,000 photographs to work with. He then selected about 3,500 of the images (he didn’t use the ones shot at night, for example) and combined them into a time-lapse video showing the passing of 1 year and 4 seasons in a mere 2 minutes.
Solheim is also working on creating a similar time-lapse using only the night shots. You can learn more about the details of his process on this behind-the-scenes blog post.