They're being "prepared" for future public office, and one of the things they're probably taught to do is keep calendars. It might have been a class assignment, too, and counted towards his grade.
-PJ
Two of my grandsons go to an exclusive private school and I doubt they could find 2 matching socks in the morning. Keeping calendars like that and for that long takes a certain kind of discipline. Good for Kavanaugh, if true.
I think that’s the thing. Hoity-toity prep schools where all males are being groomed for high positions, even POTUS, would stress keeping detailed schedule notes.
For a long time, students have been encouraged in their orientations to University to keep planners/calendars; I don’t doubt this has also been encouraged in college-prep high school studies.