[Mandolin]

I'm still not cleared on why the entrance to "Freezeezy Peak" is called the Advent Calendar. I know about the song entitled 'advent' that sounds like it belongs in the long lost "Fugus Forest" but is never actually heard in the game, (and I haven't heard the song, either) but the entrance to our beloved icy level looks more like a refrigerator with pictures on it that a calendar to me. Can someone clarify?