Mac Tonight was the moon-faced character created for McDonald's 1986 advertising campaign.
The character wore formal evening clothes, sunglasses, and a crescent-moon head. The campaign targeted dinner and evening visits, giving McDonald's a distinctive nighttime identity at a time when many fast-food advertisements focused mainly on daytime or family occasions.
Mac Tonight's commercials used a modified version of “Mack the Knife,” linking the character to a familiar popular-music hook. The campaign became visually memorable because the moon head and tuxedo were unusual departures from McDonald's usual restaurant imagery.
Mac Tonight is sometimes confused with a permanent McDonaldland character such as Grimace or the Hamburglar. Unlike those characters, Mac Tonight was primarily an advertising mascot associated with a specific 1980s campaign.