My PIL always gave DH and I major grief if we were not available on Christmas Eve, Day and Boxing Day for them (including SIL) to come stay with us for a few days. Then, on NY Eve/ Day they expected us to go to theirs. As a result my own family missed out a bit.
Then their DD got married and they took it in turns with us, which still restricted us a bit as we often liked to go away over Christmas. DH said we shouldn't as Christmas is about family.
I've noticed that over the past few years when it is our turn that PIL have booked holiday away. Now they are telling us they are going away from the 19th, coming back a few days after NY. Apparently we can do Christmas with them before they go, and do NY when they get back.
Whilst I am glad they are not coming, as my Christmas will be more peaceful, I am sad for my DH as I can see that he is hurt. He is very much the scapegoat, DSis the golden child. Also, they won't see DGC for the whole of Christmas and NY.
AIBU to say that Christmas is the 24th, 25th and 26th and NY is the 31st and 1st and I am not hosting or schlepping round outside of this. If you go away for Christmas and NY then you can't expect everyone to double up on celebrations and costs.