Sept. 13 through Nov. 2, 2024 (select dates) HALLOWEEN NEVER STARTS ON HALLOWEEN, at least not for the devoted fright fan. People who adore the eerie occasion often celebrate it in “Augtober,” otherwise known as August, and even in July, once the Fourth of July has wrapped. But a Friday the 13th that falls in September? You can count on a chilling atmosphere to arise, even if there isn’t yet an actual chill in the air, temperature-wise. And few places do Friday the 13th like the Winchester Mystery House, the enormous San Jose abode that is famous for oodles of eerie rooms, staircases leading to nowhere, and doors opening to walls. Oh yes, and the number 13 popping up, again and again, in the home’s design: It was a favorite of Sarah Winchester, the storied chatelaine of the Victorian manor.