I'm going to leave my wife before christmas
Why does it have to be before Christmas?
Because she gets on my nerves this season.
It's okay to leave your partner, but is it so bad that you have to do it during Christmas? The holidays are supposed to be a good time of the year.
It's fine. The divorce will be finalized in the next year.
Maybe you can wait until after the New Year? It seems wrong to leave your wife during Christmas if you respect the history of your relationship.