Oliver Burkeman writes about what it means to be done for the day:

If you’re caring for a three-year-old, or stuck in meetings, from 9am to 2pm today, the fact that the annual departmental review “needs” completing by 3pm is irrelevant. It’s not going to get written. So maybe “done for the day” will have to mean jotting down a few preliminary ideas for it instead.

I had to find this out through trial and error over a few decades, but you don’t have to! He also has a new book out soon, available for pre-order.