Although waiting confirmation, it looks pretty likely I will be working Christmas eve and Christmas day morning this year (nurse). 
My kids will be 6 and 4. I really don't want to miss them opening their presents but I won't be home until about 2.30 / 3ish. I don't want them to wake up Christmas day morning and think Father Christmas has missed them out though. Any good excuses? Or alternatively we leave the presents under the tree as normal Christmas day morning and poor DH has to try and distract the kids from the Christmas presents all morning!