Whut but how!?

I know for certain that when you have a shop up, nothing can expire. I don't know how he did it though, because it would be impossible for him to keep the shop up for 2 years. Also, if he were using the storage to preserve it, it would still be impossible because the item would disappear upon being taken out of storage. The last thing is that if you put the item in legendary spirit, the item expiration date disappears, but its only temporary.

I'm really baffled. I would really like a permanent Rudolph nose though.

Perhaps it was like what Cash Shop items do; he took the Nose out of Storage/Duey/whatever, ran as fast as he could to the FM and set up a shop and put it in there before it could actually expire. Sometimes when my Cash Shop items say they're gonna expire, it takes them sometimes up to 3 or more minutes pass the expiration date/time to actually expire.

Otherwise, I have no idea how they did it.