In the Czech Republic, New Year’s Eve is called Silvestr, for the anniversary of the consecration of Pope Sylvester I, a saint who served as Pope of the Western Church from 314 to 335. Since the adoption of the Gregorian calendar in 1582, the December 31st feast date has coincided with New Year’s Eve. (Italy, France, Poland, and numerous Eastern European countries similarly refer to the last day of the year.)