Conversation so far:
Where was Gloria Estefan born?
Gloria Estefan was born into a middle-class household on September 1, 1957 in Havana, Cuba.
Did Gloria Estefan have siblings?
Where did Gloria Estefan go to school?
Gloria Estefan went to college at the University of Miami.
What did Gloria Estefan study at the University of Miami?
Gloria Estefan graduated from college in 1979 with a B.A. in psychology, with a minor in French, from the University of Miami.
Did anything notable happen in Gloria Estefan's childhood?
Gloria Estefan's mother Gloria Fajardo won an international contest and received a Hollywood offer to dub Shirley Temple's films in Spanish.

Question: When was that?
Self-contained rewrite: When did Gloria Estefan's mother win an international contest?