Sister-in-law served dinner after midnight last year, weren't invited back
So last year my wife's sister hosted the family Christmas dinner, and because of her terrible planning skills we waited more than 6 hours and then finally left to eat at Jack in the Box. This after not eating all day in anticipation of a big dinner. The year before she served dinner after 10pm. Nonetheless she found it extremely rude and I finally found out we had not been invited (my wife still insisted that we go).
I am now planning on hosting the dinner at our house and letting everyone know we'll start dinner at precisely 6pm. This will probably start a war if anyone comes to our dinner instead... my wife says wait 'til next year and send out invitations earlier but I feel like her sister is the one who started this by being a bad hostess and then not inviting us.