"Baby, It's Cold Outside" (1944)
is a pop standard with words and music by Frank Loesser. In the United States it is generally categorized as a Christmas carol and is mostly performed during the month of December, although the song does not refer to Christmas. Furthermore, the song gets considerable air time in the typically cold months of January and [bad word] in the northern hemisphere and likewise during winter in the southern hemisphere.
=======================

I really can't stay
(but baby it's cold outside)
I've got to go away
(but baby it's cold outside)
This evening has been
(been hoping that you'd drop in)
So very nice
(i'll hold your hands, they're just like ice)
My mother will start worry
(beautiful whats your hurry)
My father will be pacing the floor
(listen to the fireplace roar)
So really i'd better scurry
(beautiful please don't hurry)
but maybe just a half a drink more
(put some records on while i pour)