Hello,
I found some information on their Shipping & Pickup help page but this is likely specific to the U.S. as that is where I am located. In addition, calling your local Apple Store is likely a good idea as they could let you know about how long they could/will hold items late for pickup. You also may want to elect to have a friend or family member pick up your oder if they could before the 5th of December.
Shipping & Pickup - Shopping Help - Apple
"If you’re unable to come in during this time window, you can pick up your order afterward, but wait times may vary."
"If you would like someone else to pick up your items, select Someone else will pick up these items. To pick up your items in an Apple Store, you will need to bring the order number and a valid government-issued photo ID. If you have designated an alternative pickup contact, they will need to bring the order number and a valid government-issued photo ID."
I hope this helps.