Not sure what this proves. Would he have EVERY gathering of friends on this calendar? Let’s say he is driving home from football practice and has a teammate that he is dropping off. The teammate says, “Hey, wanna come in and grab a couple beers?” Would Kid Kavanaugh then go home later and note “had 2 beers at Mark’s house for 30-minute visit”?
Per others in the thread: 1) it establishes seriousness, sobriety, attention to detail and integrity; 2) it throws the “prosecution” off balance as they do not know what else he has and they cannot let her pin down a date now.