My best friend is an attorney and she has calendars from HS and college.
LOL I’m an attorney too and have years and years of calendars stored as well, but I don’t think I keep a paper calendar in HS. I have them all since college, however.
Somewhere out there in the garage, is a box containing Christmas cards, birthday cards and yearly calendars that my late wife kept.
I knew she did it in High School, we were all so busy back then with sports and other events.
After she passed, I found her report cards all the way back to First Grade and cards and letters we exchanged during college. She kept everything dear to her.