I think she'd be fine too, if you're at home.
When Sapphi was done she was back to normal the day after, it was keeping her calm that was the problem.
Barney was not good after his castration the night it was done and the following day. He had to go back to the vets and he'd been quite poorly. Despite this he was almost back to normal the day after that.
If she's being done on Tuesday, you've got four days where your vets will be there. I would think if you were going to have a problem it would have come to light by then. Your vet will have emergency arrangements, either covering themselves or an emergency centre. If it was me, and I was having a quiet Christmas at home, then I'd do it.