he has DD every other weekend, ( or there abouts, depending on his work, Army)
So hes having her last weekend in nov, so it follows he should have her fri 10th, sat 11th to bring her back sun 12th.
Just text him to tell him that DD is in a christmasa concert on sat 11th at 9:30am. That it would be a shame if she couldnt go as she has been working on her costume/practising for months. That he could come to the concert, but only him as its only two people watching per child, and then take her from there.
Hes text back ' im not having her that weekend, its my works xmas do'
FFS.
AIBU to want to stab him in the eye with a hot poker?