Mac Tonight was McDonald's moon-faced mascot who promoted late-night dining in 1986.
The character appeared in a series of commercials built around a crooning, piano-playing moon. The campaign used a modified presentation of “Mack the Knife,” linking the character to evening entertainment while encouraging customers to visit McDonald's at night.
Mac Tonight was visually different from the McDonaldland cast. Instead of being a regular resident such as Ronald McDonald or Grimace, he functioned mainly as a campaign character tied to a specific business goal: increasing evening and late-night sales.
The advertisements became memorable because of their unusual combination of a moon head, sunglasses, formal clothing, and lounge-singer styling. The character's name is often written as two words, “Mac Tonight,” and should not be confused with the company's later slogans or standard mascots.