Sorta silent Christmas in July

It's time for Christmas in July again,  with  Christmas sales in stores  and Christmas movies on TV, I am told that the first 'Christmas  in July' was a tactic for attracting customer to ski resort in Australia, where it is wintertime at this time of year,  Christmastime is during their summer.  I  feel certain it's popularity has something to do with the heat and humidity of our summer.