McDonald's 1980s moon-headed character who promoted evening visits was Mac Tonight.
Mac Tonight was designed as a singing, sunglasses-wearing moon for an advertising campaign focused on dinner and nighttime business. The character performed a modified version of “Mack the Knife,” with lyrics built around “Mac Tonight.” This combination of visual novelty and a familiar tune made the campaign unusually distinctive within McDonald's branding history.
The character was not part of the original Speedee-era identity and was not the same as Ronald McDonald. Ronald anchored McDonald's family and children’s advertising, while Mac Tonight targeted a different occasion: visiting the restaurant later in the day. The campaign therefore extended the brand beyond its traditional lunch and family positioning.
Mac Tonight is also remembered because McDonald's later stopped using the character. Its limited period of prominence makes it a historical advertising figure rather than a current permanent mascot. The moon head, black sunglasses, and lounge-singer presentation identify him clearly.