Yes, as a user of almost 5 years... You'd think I would know this.

Or is it too late?

its too late :/

Entries for the contest closed already, sorry. D:

Was there an announcement or anything? :S

The post that announced the contest stated that it would be ending on the 10th. :(

And I don't think they have put on a Costume Contest the past 5 years; The idea for a contest started during the EPICon event. :)