Guess the deadline

I have written an anomaly detection system on my server to ping me when the logs show some unusual activity (yet another story for another day).

I investigated a surge in traffic on one of my webpage:

For context, the web page in question is the instructions for my students on how to write and submit the work I'll grade them on.

This web page was given to them two to four months ago, with explicit instructions to submit early and often.

Can you guess when the deadline was ?

Yes, on the 6th of january.

If any of you have tips and tricks to have students work when I'm still available to answer questions, and not the night before, I'm all hears !