Actually the NT gives Christians the liberty to observe any day as special. And Christians have made good use of Easter to spread the Gospel. Sure there is a lot of nonsense and commercialism too. But we should focus on the propagation of the Gospel, not nit-pick about the ancient pagan origins. We could do that for the days of the week, but do you see Christians refusing to call Monday "Monday"?There are NO religious holidays in the NT but celebrate this day if you like, but it's unscriptural.