Earlier quoted context omitted.
> For example, my assignments are now largely due at midnight, at a very particular second: submit a nanosecond late at your own penalty. From the instructor's point of view, there's no winning here -- there will always be a cutoff, and any position of it will lead to complaints. Even for an informal system, there's always a last person allowed in, and hence a cutoff. If you have a good reason for an extension, you c…
Slippage is never pointless but rather an important aspect for any efficient system. If you are setting the deadline at midnight instead of 4pm then you are making most of the students work longer on the assignment. Set the hard deadline to 4pm and then allow a few students to submit late. That ends up being less of a burden on students and society.
I have seen deadlines wrap all the way around a 24 hour cycle in this way. 5 PM is bad because people want to work at night, so delay to midnight. Well, people aren’t finishing, so delay to 5 AM, since everybody would be asleep then. Well now people are blaming you for “forcing” them to do all nighters, so delay to 9 AM. Now people say that’s unreasonable, because submitting later in the workday wouldn’t hurt anyone. So delay to 5 PM.