We're going to my parents a few days before Christmas, and travelling to his mum's on Christmas Eve. I arranged this with his mum a month or so ago, as she likes to know in advance to organise her own Christmas (visiting family and friends) around it. DH has a history of not organising anything, so I cut out the middleman (so to speak!), made plans with her, then told him.
It turns out that two weeks ago, he arranged to go to his dad's for Christmas day. I have just found this out after asking him to ring his mum back re: presents, and to let him know that his aunt and uncle would be there on Christmas day to. He said, "well we won't be there, I've arranged to be at my dad's." I pointed out that we can't use his mum's to stay at Christmas Eve, then bugger off to his dad's - we agreed we would go there. He says it's her fault because she didn't ring him, and his dad's fault because he should have mentioned it to his mum.
I'm not actually BU to be frothing at the mouth over his attitude, am I?