I feel kind of silly because there have been a lot of posts like this ( that I just discovered) and I still thought from the rules on the main page that it was 72 hours from the assignment day not from when you posted.

I was preparing to be gone for the weekend with no internet so I did 2 days in one day on the 15 (days 15 and 16) but I didn't get around to 17 or 18 so I though I would have today (the 19th) to catch up but I saw in the email that I'm out of the running today :(