What do I do?

Okay, I admit it, I peeked at my email just after midnight to see if anyone managed to send me an email birthday greeting right at midnight like I got last year. Nope. Oh well. I did get an email and a call today from friends, so that's okay. And my Dad congratulated me on turning a year older than I actually will be ....

But there were four copies of an email from a student: "I just finished my exercise and want to upload it, but the system won't take it, it says that it is too late. What do I do?" All identical.

My answer - the deadline was 23.55 - was "Get done earlier next week. I don't accept late work." I only sent it once, though.

They are supposed to be adults, what is so hard to understand about that?