I realized that the pages for the hacked Jamaaliday Calendar items don't do much to explain why they're not on the Calendar. So here's the proof this Wiki follows:
http://animaljam.wikia.com/wiki/Thread:523421 (Proof Thread)
http://animaljam.wikia.com/wiki/Thread:521403# (Evidence Thread)
Anyways hope you understand, the items are indeed hacked, and this Wiki treats that as confirmed fact for one reason; because it's confirmed fact.