The annual Dec. 26 start of the Santa Anita season has a natural, anticipatory, turn-the-page vibe to it. But this mark-your-calendar Opening Day mainstay hasn't always been a post-holiday tradition. Although Santa Anita has kicked off its winter/spring meet on the day after Christmas every year since 1977, the track originally opened in 1934 on Christmas Day itself, and did so for the first four years of its existence. "Filmdom entirely forgot its world of make-believe to migrate to the Santa Anita track yesterday for the renewal of horse racing...