When Pinkie Pie finds out that Luna hasn't celebrated a birthday in over a millenium, she is determined to help Luna make up for missed parties with the biggest, best Un-Birthday bash ever. But all Luna wants is quiet, personal time with ponies who care about her. Can Pinkie learn to understand what Luna needs from her little pink friend?

Featured on EQD 10/7/2013:

http://www.equestriadaily.com/2013/10/story-un-birthday-for-princess.html