I say good on him, if he supports the action not to fine parents for taking their kids away in term time then why not.
I dare say (no facts) that during half term and such he’s working on behalf of the school in one form or another.
My Sis is a Head, earns a decent whack but for that most of her half terms are taken up in preparation or other work related actions. Fair play in the summer term she buggers off somewhere, so too Xmas but the other holidays are taken up either teaching underprivileged kids or next term prep.
However I counter all his actions with a silly mistake by sending in a sick note covering him when the facts everyone knew beforehand.