Enabling time-based automatic theme change
Must change $USER variable to your username at autodark.service, and also appropriately change the path to your .autodark.sh file, and give it the execute permission with
sudo chmod +x /path/to/.autodark.sh
Also must change .autodark.sh and replace 17:30 and 05:30 with the time to activate dark and light themes respectively.
Instructions in suspend_instructions.md show how to enable suspend.target for use with systemd's user group and resumedark.service.