“The fervor over San Francisco’s glorious new baseball park was cresting. It didn’t matter that the first game was delayed several weeks by a tough winter. When Opening Day at Ewing Field came on May 16, 1914, thousands of fans traversed up to Lone Mountain and poured into their new baseball home.”
It was the milder winters on the Pacific side that allowed for it, an extra month on either side, early March to late October.