Annie on My Mind was a joyous read, taking me on a journey of two young adults falling in love with each other. I understand now why it's such a highly recommended LGBTQ+ classic novel: despite being set in 20th century America, the characters and story are timeless on their own. No specific dates are mentioned, and none are needed to ensure the story makes sense. You can kind of guess it on your own, if it's really important to you.