1920's The Kid (1921)
1930's Snow White (1937)
1940's I Walked with a Zombie (1943)
1950's Vertigo (1958)
1960's Mary Poppins (1964)
1970's Jaws (1975)
1980's Valley Girl (1983)
1990's Silence of the Lambs (1991)
2000's The Lord of the Rings: The Fellowship of the Ring (2001)
2010's Captain America: The First Avenger (2014)
The 20s is the era I'm most shaky on. Haven't really seen that many of those.
Toughest decade to pick was the 1970s