at is a tool that schedules a job to run once, at a specific time.
Combine with notify-send for reminders.
These jobs persist on reboot.

Install

sudo pacman -S at

sudo systemctl enable atd
sudo systemctl start atd

# ?

launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist
# add your username to: /var/at/at.allow

Anonymous