MarsSeed [1] filed a deletion request for gnome-schedule [2]: Broken, discontinued GNOME2 applet from 2016. Its mandatory makedepend, rarian fails to build since at least 3 years ago.
Not useful to keep. There is a successor fork based on Python3/Gtk3, called gtock. [a] As pointed out by AUR user @archisman in a comment on 2023-03-26. [a]: https://github.com/rizalmart/gtock [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gnome-schedule/
