I thought the deadline was Jan 1?
Well, there goes my sub.
Aly and I had a (rather heated) discussion about the deadline last night. While I can definitely sympathize with you for being caught off guard by the timing, in the future, make sure to figure out when the deadline is in your timezone well in advance.
For people who host contests in the future, keep in mind that listing a particular day as a deadline leads people to anticipate the contest finishing on that actual day (regardless of timezone). In the instance of this contest, for example, Dec 31st 23:59 would've been a better end time, as the contest would end on Dec 31st regardless of your timezone.
No offense to Aly, of course - nobody anticipated the deadline being an issue until it became a very immediate issue. At least now we know!
EDIT: Also you should totally extend the deadline by another day or something! I know you're upset about people complaining even thought it's technically their fault, but I also know there's a lot of people upset wasting all the effort they put into their maps, and this can still be fixed.