Mac Tonight was the McDonald's advertising mascot featured in the 1986 campaign for a singing moon.
Mac Tonight was portrayed as a character with a crescent-moon head, dark sunglasses, and a tuxedo. The campaign promoted McDonald's evening business and used a rewritten version of the song “Mack the Knife,” giving the character a distinctive musical identity.
The mascot was created for a Southern California advertising campaign and became associated with the broader “It’s Mac Tonight” promotion. Its visual style differed from McDonald's long-running family characters, particularly Ronald McDonald.
Mac Tonight is sometimes confused with Mayor McCheese or the Hamburglar because all were part of McDonald's fictional advertising world. Unlike those characters, Mac Tonight was specifically built around nighttime dining and music.