Whatever may be the case with the spirits, the initiates who sing "Happy Trails" to them certainly have a sense of humor.Christmas was set on "VIII Cal. Ian." (i.e. December 25th) long before Pope Gregory's English mission. The letter of Gregory to Augustine is famous and widely quoted. As I recall it advises A. not to supress his converts' urge to make merry, but to direct it into Christian channels. He specifically advises having them build lean-tos out of branches during their celebrations if they are accustomed to outdoor merrymaking.
T.