Simplify the following text for a Grade 8 native English-speaking person.
Original: The Harlem Renaissance is the name for a movement in African-American culture in the 1920s and 1930s which has had a big influence on African-American literature , philosophy and music . The Harlem Renaissance is also called the `` Black Literary Renaissance '' , ' `` The New Negro Movement '' and `` The flowering of Negro literature '' .
Simplified: The Harlem Renaissance was a cultural movement that spanned the 1920s and 1930s .