Saint Sylvester, also known as Pope Sylvester I, was a pope in the early Christian Church, serving from 314 to 335 AD. He is often associated with the Constantine the Great era, during which Christianity gained prominence in the Roman Empire. Sylvester is credited with overseeing the construction of several important churches, including the Basilica of Saint John Lateran. Saint Sylvester's feast day is celebrated on December 31st, marking the end of the year. This day is also known as New Year's Eve in many cultures, where people gather to celebrate the upcoming year. His legacy continues to be recognized in various Christian traditions around the world.