I finally found the box containing my mother's journals and appointment calendars from 1971 to 1976, 1980 to 1982, and 1990 to 2004. I already had 2005 and 2006, so this fills in a lot. (She stopped writing in late 2006 because she could no longer hold a pen.) Somewhere there's one more box, I hope, but this is by no means certain.
The contents are mostly mundane. One interesting nugget: I finally found the date I first took an airplane flight. On 19 April 1974, at age 3½, I flew from Chicago to Los Angeles with my dad. I'll have to do the math later, but it looks like I've spent about 11 months of my life in L.A. altogether, which is about what I figured.
More later. It's hot, and I'm running late for dinner.