It is possible to execute any shell command, playback of audio and video files, loop playback, crossfade and auto-stop media playback.
The app integrates into the system tray and allows you to view, activate, add, edit and delete jobs. Possible repetition of jobs.
In Alarm Clock you can change the playback volume of media, a snapshot of your screen, open documents and applications.
Installation into Linux Mint:
If for some reason your distribution absent the repository with this program, add the PPA and install:
sudo apt install alarm-clock-applet
May the Force be with you,
sudo add-apt-repository ppa:joh/ppa sudo apt update sudo apt install alarm-clock-applet