well, you could say how its evolved to include everyone of all cultures and not just those of christian-background. As not exactly everyone celebrates it because really- its part of the christian belief, and if you do statistical analysis- the majority of the population arent all part of the christianity belief system.
Christmas has evolved to be incorporated into practically all peoples lives- The fact its a public holiday, the shop sales, the presents, santa claus myth, the christmas card tradition, christmas dinner- Some people celebrate it because its a necessity of their beliefs- the birth of JC, while others do it as a means of taking advantage of a public holiday and relaxing. And the presents and sharing has no limits-everyone gives each other presents- the sharing and love factor provokes people to celebrate? lol, i have no idea what im talkin about
, just trying to help lol.