Been struggling with a solid metaphor for this icon for a while now. DarkSome is a tiny little app that basically toggles macOS between day and night mode. Sits in your status bar (hoping Apple just rolls this feature into the OS next big update).
Open source. Here's a link: https://blog.kruyt.org/darksome/
Sun. Moon. I mean it's all been done before. I tried every which way to make them novel. Then it dawned on me. Night. Dark night. Dark Knight. BATMAN!
As always, stay righteous 🙌🏼