The NBA on Christmas Day is a tradition like the NFL on Thanksgiving. Most fans feel like the season starts on Dec. 25 and it usually feels that way. About a quarter of the games are in the books and the league schedules the biggest games of the year on Christmas, so you can watch as you unwrap your gifts. There have been legendary performances throughout the years like Wilt Chamberlain's 36 rebound performance in 1961 and Bernard King's 60-point barrage in 1984. Christmas Day has also been a day of renewed rivalries like the Celtics vs. the Lakers or the Knicks vs. the Bulls. So to gear up for today's slate of games we present the 15 Most Memorable NBA Christmas Day Moments.