In late May 2511, Unification day was declared (boo, hiss!).
For more information - http://www.mts.net/~arphaxad/firefly.html
Now being Browncoats, we don't expect anyone to make things in honor of the purple bellies. You can make whatever you want, how ever you want to interpret "U-day Celebrations"
Don't forget to add the "bdcchallenge" tag to your challenge entries (and remove your tags from your April challenge entry) so that we can feature your creation in a post later this month to honour all the Challenge entries!