The Olympian will be tearing open selection boxes and taking three whole days off to enjoy the festive season.
While it might not seem like much to the rest of us, it's a lot more than Katie is used to.
Last year, the 26-year-old was on a strict training regime and could only afford to take one day off over the holidays.
"Last year was tough," the Bray native told the Herald. "I had to watch what I ate and I trained all through Christmas.
"I only had one day off and I think that was only because Christmas fell on a Sunday."
But Katie is looking forward to a more laid-back Christmas this year.
"This time I will have three whole days off. I can really enjoy it and I can eat everything around me."
Despite being a top athlete, Katie admits she has one vice.
"I'm a huge chocoholic," she says. "That's the one thing I have to watch when I'm coming up to a fight. So it's great over Christmas because I can have a good few selection boxes."
But while she may enjoy all the Christmas treats, Katie says she a disaster in the kitchen: "I can't cook at all.
"It's really embarrassing. That's my New Year's resolution: to learn how to cook. My mam does everything on Christmas day, so I'll just be watching her and taking notes."
Katie plans on having a quiet New Year's. "I'm not a fan of going out on New Year's Eve; everyone seems to be in town and it's very busy."
She is already gearing up for her first big fight of 2013, at the Bord Gais Theatre on February 24.
"It's great to have a date to focus on: it gives you that extra motivation. And fighting in Dublin is always great. It's a brilliant crowd."
After the break, Katie will hit the gym: "I'll be stepping my training up after Christmas. I've got to defend my title.
"I train twice a day, six days a week, maybe four hours a day. After Christmas I will really be focusing on my training.
"I can't wait to get stuck into it."