Dark and Light Wallpapers - made easy and
Run your AppleScript at sunrise and sunset (for example to switch dark mode)
Automatically switch between light and dark wallpapers based on sunrise and sunset, or on your own schedule.
Instantly see sunset and sunrise times.
You can also run your own Apple Script at sunrise and sunset.
(The linked tutorial shows how you could write an AppleScript to toggle Dark Mode at sunrise and sunset.)
Easily switch with a single right-click on the menu icon