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Easter - wikipedia, Easter, called pascha (greek, latin) resurrection sunday, festival holiday celebrating resurrection jesus dead, . https://en.wikipedia.org/wiki/Easter Computus - wikipedia, Computus (latin "computation") calculation determines calendar date easter. date based calendar-dependent equinox . https://en.wikipedia.org/wiki/Computus Holidays observances united states 2016, Overview holidays observances united states year 2016. http://www.timeanddate.com/holidays/us/2016