Editor’s Note: Monday nights at the tail-end of summer usually aren’t prime time for hypnotism, but it’s not every day 20-year-old alt-pop prodigy Zella Day rolls into town. The Arizona-born singer-songwriter played the Sinclair in Harvard Square, Cambridge last night, with opening sounds provided by homegrown trio Photocomfort, and Vanyaland’s Eddy Leiva was on hand to capture the visuals. Get hypnotic with his gallery below…