Not miss (something) for the world phrase spoken
Would definitely go to an event, see something etc.
"Will you attend the school's prom this year?" "I wouldn't miss it for the world."
I am a big fan of this actor. I won't miss his upcoming film for the world.
I can't miss any of his performances for the world.
The origin of this phrase is not clear.
This phrase emphasize that Christmas takes place once a year time, so you should grab this chance to indulge yourself and be good to others.
I've eaten a little more than usual as today is Christmas and Christmas comes but once a year, right?