What is dday_in_mac_menubar?

This is a small Mac app that shows a D-Day style countdown right in your menu bar, the strip of icons at the top of your screen on macOS. A D-Day countdown counts down or up the days to or from a date you care about, such as an anniversary, a deadline, or a birthday, and this app keeps that number visible at all times without needing to open a separate app or calendar. The README notes that the project was entirely generated by AI. To install it, you open the Terminal app on your Mac, which you can find by pressing Command and Space and typing Terminal, then paste and run a single command that downloads the project and runs its install script. macOS may ask for security permission during this process, which needs to be allowed for the app to work. The app requires macOS 13, also known as Ventura, or a newer version. Once installed, you click the calendar icon that appears in your menu bar and go into its settings to type in the name of your event and its date, then save it. The app is set up to start automatically each time you log in, and this is turned on by default the first time you install it. To remove the app, you delete its application file from your Applications folder using a short command in Terminal. The README is brief and does not mention a license, so it is not clear what rights are granted for reusing or modifying the code.