A while ago I spoke to DB to try to work out when we could meet up "over Christmas". He said that he needed to consult with SIL, who apparently manages their family diary. I advised him that (at the time) we had no definite plans after the 22nd on any day apart from Christmas Day and the 27th so could pretty much fit round them.
Today I chased him up as he'd not got back to me. I was "advised" that SIL had very efficiently allocated us a slot on either 3rd or 7th January so were welcome to choose between them. And that they had no other days free before the DC go back to school. As I go back to work on 2nd January, neither of these days are any good for us. DB is pssed off because I said I was free on "any" day. I'm pssed off because I figure that most people would realise that the 3rd and 7th were normal working days and that in any case DB might have prioritised his only sibling to a date a bit closer to Christmas.
Who is BU?