In the early days of Massachusetts Bay colony, it was illegal to observe Christmas...you were expected to go out and work on December 25, unless it was a Sunday. A law of 1670 imposed a fine of five shillings for not working or for feasting on Christmas. In 1686 Governor Andros arrived in Boston just before Christmas and insisted on celebrating Christmas (he was a mainstream Anglican), which caused a lot of conflict with the local Puritans.
Yet we're supposed to believe that religion played no part in the founding of this country, and that a "wall of separation between church and state" has always existed.