Study timetable planner

List your subjects and press Build timetable.

The sharing rule is visible: sessions a day = floor((free minutes + break) / (session + break)), so an overrun session is never squeezed in and a day with no room stays Rest, which is worth keeping once a week. Each subject's time is proportional to priority plus difficulty, split into whole sessions by largest remainder, and slots go to the subject furthest behind its share without repeating the same subject back to back while another is owed time. Calendar times float, so they follow whatever zone your calendar app assumes.