Global warming refers to the average temperature of the entire earth, over a period of years.
Not just one day in the wintertime in one particular place.  As soon as it snows, people
forget all about how hot it was last summer.  Where I live it has been in the mid 70's.
Usually at this time of the year it is in the mid 60's.  So you folks in the cold are basically
donating your share of global warming to us folks where it is warmer than usual.