I think it would be pretty cool if bungie decorated certain parts of the tower in celebration of certain holidays. Sort of like the stuff Google does. For example: Halloween: jack-o-lanterns all over the place. Thanksgiving: the soccer ball would be replaced with a live turkey that you can kick around. Christmas: the tree would have ornaments and tinsel and there would be a nativity scene in the courtyard. New year's eve: a huge light show could be projected onto the traveler's surface. St. Patrick's day: All the guardians are forced to wear green armor. The shops will sell alcohol that makes your guardian dizzy. The purple ball is replaced by a fat leprechaun that swears at you in an Irish accent. Easter: a furry goes around laying colored eggs. Independance day: fireworks galore! Obama's Birthday: Guardians will be forced to give up %90 of their glimmer to play Destiny.