Here's a few places to start: https://github.com/alainm23/planner https://apps.gnome.org/Calendar/ https://wiki.gnome.org/Apps/Evolution/ https://apps.kde.org/merkuro.calendar/ Planner/Planify is an all-around decent to-do list/calendar app, kinda like Things for MacOS. From there, you could also check out GNOME and KDE's default calendar apps to see if either of those do anything for you. Finally, if you want all th…
Planner is EXACTLY the kind of timetable app I'm looking for, thank you so much!