PHOTOGRAPHY: Robert Tat Gallery presents a group exhibition of vintage and contemporary photographs, Sign of the Times, celebrating the special qualities that are captured when images incorporate existing signage into their compositions.

5 to 7:30 p.m. // Robert Tat Gallery (49 Geary Street, Suite 211) // free

FESTIVAL: The 1st Annual Green Film Festival kicks off tonight with a screening of Bag It, which follows “everyman” Jeb Berrier, an average American who decides to take a closer look at our cultural love affair with plastics. The film is followed by the fest's Opening Night Gala.

7 and 9 p.m. // Landmark Embarcadero (Two Embarcadero Center) // $12.50-100

FILM: Balboa Theater celebrates the 40th anniversary of Simon & Garfunkel's legendary album, Bridge Over Troubled Water, with a screening of the documentary, The Harmony Game, which tells the story behind an album shrouded in rock n' roll mythology, including legendary tales of inspiration, innovation and separation.

7:30 p.m. // Balboa Theater (3630 Balboa Street) // $10