There is only one other main theme in Mama Day, by Gloria Naylor, than the one of the supernatural. The other main theme in the text is one of cultural heritage.
Normally, one's cultural heritage is either accepted and revered or rejected and ignored. In Mama Day, Cocoa must come to terms with the fact that she cannot escape from her cultural identity and cultural heritage. The fact that the Day family adheres to the traditions of their family's past shows the respect that they have for their own cultural heritage and identity. In over half the book, Cocoa (trying to come to terms with her past through escape) realizes that she must learn to accept and embrace her past in order to find the inner peace she is so desperately searching for.