If you're not on christmas day to open the stockings, will they disappear or stay there till you sign on again?

They were opened automatically last year, where "__ fell out of your stocking" showed up like an alert. I signed on on Christmas Day last year, but I would expect it to stay like that until you got back on. :3

hope so cos not sure when they can get on and I've been fillin their stockings with crap all week