Phase of the moon
There are a lot of reasons why we still look at the moon. Some of us (like myself) do night photography. Religions and astrologers ascribe meanings to the moon. Still other people haven’t quite gotten over watching the Teen Wolf series of movies and only shave every new moon.
I had a phase-of-the-moon generator running for a long time that would generate a RSS feed that I could integrate into other sites, but I took it down after a while.