What is the X in X-mas?
a state of mutual harmony, friendship, and respect, esp. between or among nations or people; civility
Latin comis 'courteous, friendly'
early 15c., "association," from French comité, from Latin comitas "courtesy, friendliness, kindness, affability," from comis "courteous, friendly, kind," of uncertain origin. Meaning "courtesy" in English is from 1540s. Phrase comity of nations attested from 1862: "The obligation recognized by civilized nations to respect each other's laws and usages as far as their separate interests allow."