Mac Tonight was McDonald's 1980s advertising campaign centered on a moon-headed singing character.
The campaign debuted in 1986 and presented Mac Tonight as a suave, crescent-moon-headed performer wearing dark sunglasses. Its advertisements used a rewritten version of the song “Mack the Knife,” promoting McDonald's as a place to visit in the evening.
Mac Tonight was designed to support McDonald's late-night business and give the brand a distinctive character separate from its better-known daytime mascots. The character became especially associated with piano-playing television commercials and a sophisticated lounge-singer style.
Mac Tonight is sometimes confused with the McDonald's character Moon Man or with later late-night promotions. The campaign's defining identity was the moon-shaped head and the musical presentation, while the name itself was a direct play on “Mack the Knife.”