Mac Tonight was McDonald’s singing crescent-moon mascot introduced in a 1980s advertising campaign. The character wore sunglasses and performed a rewritten version of “Mack the Knife.”
The campaign was designed to promote McDonald’s as an evening destination, especially for dinner and late-night visits. Mac Tonight’s moon-shaped head made the character visually distinct from Ronald McDonald and the McDonaldland cast.
Mac Tonight is sometimes confused with Grimace or other McDonald’s characters because all appeared in television advertising. Unlike those mascots, Mac Tonight was closely tied to a specific musical campaign and nighttime positioning.