Superman #145 1999

Superman #145, published by DC in May 1961, presents three distinct adventures. In "The Secret Identity of Superman!", Lois Lane's inability to keep a secret is comically tested. "The Interplanetary Circus!" sees Superman forced to contend with an alien troupe. Most notably, "The Night of March 31st!" offers a surreal April Fool's Day narrative where Superman experiences a world turned upside down, featuring appearances from Supergirl, Krypto, Lori Lemaris, Lana Lang, Lex Luthor, Brainiac, Bizarro, and Mr. Mxyzptlk in unusual roles, making it a unique Silver Age issue for collectors.