I really want to know the answer to this so do tell me.
I may be hosting a large family event on Boxing Day. Or not. I don't know yet because one family isn't sure where they'll be on Christmas Day and this has a knock-on effect for Boxing Day. They have yet to organise themselves, basically - the whole thing could be done in a couple of phone calls.
I suspect that IABU because I like to be super organised and have everything planned and ordered a month in advance.
But I'd be interested to know if you feel it is reasonable to have Christmas plans sorted by now.