VIGIL: San Francisco FYI via FunCheapSF tells us about tonight's annual Harvey Milk and Moscone Candlelight March and Vigil, which commemorates the spontaneous candlelight march that occurred on the night of the shootings in 1978. RSVP on Facebook. (6 to 8 p.m., Harvey Milk Plaza, Castro and Market)

FILM: The Castro is alive with the Sound of Music Sing-Along through next weekend. Head over and sing about some of your favorite things and more, and if you don't know all the words, no worries -- there will be subtitles. Costumes encouraged! (7 p.m., Castro Theater, 429 Castro Street)

MUSIC: The Lab brings you another night of experimental noise, featuring Regression, Drainolith, Copy Lake, Cops, Commode Minstrels in Bullface. (7:30 p.m., The Lab, 2948 16th Street)