Boxing Day is celebrated outside the United States on December 26 (though the public holiday is often moved to a Monday depending on the calendar). It is celebrated slightly differently in the countries that observe the day, but here in Oz it is the day of rest after Christmas. You eat leftovers (and there are always plenty), there is swimming and picnics at the beach. The cricket is on and so is the Sydney to Hobart yacht race (a famous race Down Under). It's all about relaxing with the family and playing with your new toys.
Last year I lay on my sister's daybed, a gentle breeze blowing by, the sound of the kids in the pool in the background, a cold drink at my side and I started and finished the last Twilight book (perfect day to do so, no one bothered me). Yes, I love Boxing Day. But I'm sure the freezing snow is fun too! : )