Your Calendar as Both Planning and Archive Tool — MacSparky

I do this type of thing with my calendar as well.

However, as part of my overall effort to track my time and attention, I'll adjust my calendar to match what happened as the day goes by (or at least at the end of the day). So in the moment of "now", my calendar moves from a planning tool to an archive tool.

Your calendar is just the best place to track information laid out in a sequence of hours and days. It can do a number of things that people don't naturally consider a calendar tool for.