I don’t find it hard to imagine living without a calendar, or with an arbitrary calendar whose divisions are entirely within my control. In fact, while it migh

I don’t find it hard to imagine living without a calendar, or with an arbitrary calendar whose divisions are entirely within my control. In fact, while it might be a strain to keep everything straight in my head without a traditional calendar, it wouldn’t be difficult using pen and paper. One use for a paper calendar is to record distant future events such as dentist appointments, and I don’t see how that would be harder on a linear timeline instead of a grid of days. Naturally I have used scheduling software to arrange meetings, and I can imagine how it would work when you don’t have a fixed calendar. But perhaps I have an unfair advantage. Due to a minor sleep disorder, I have a 25–hour day; I sleep for 8 hours and remain awake for 17. This means that my sleep cycle is never in sync with anyone else, and the limitations of our calendaring software have always been pretty obvious to me. You can imagine the annoyance that dentist appointments cause me, since I never know if I’ll be awake during the day when I am scheduling one. Paper calendars have very limited utility for me.