Baby, It's Not Cold Outside. But we need a little Christmas anyway.
The term Christmas in July can be traced to Southern hemisphere celebrations -- for countries that celebrate Christmas but where the winter months fall around July. In the U.S., sponsoring a Christmas in July celebration became popular at summer camps for children in the 1920s and 30s. But it took a Hollywood film directed by Preston Sturges to turn the phrase into a part of the vernacular of the common people.