Qingrong Chai, 69, was hit and killed at Marshall Street and Greendale Avenue around 6:20 p.m.
Deputies say a gray SUV was traveling without its headlights on when it struck Chai. The driver then fled westbound without stopping.
The victim would have celebrated her 70th birthday on Thursday.
Detectives are asking for the public's help in identifying the suspect and locating the vehicle. Authorities suspect the car likely has front-end damage to the driver's side grill area.
Anyone with information regarding the hit-and-run was asked to contact Detective Payne at (626) 285-7171.