Mac Tonight was the McDonald's promotional character that appeared in the 1980s as a moon-headed singer.
Mac Tonight had a crescent-moon head, black sunglasses, a tuxedo, and a musical performance style. The character was created for a campaign encouraging customers to visit McDonald's in the evening. His signature performance adapted the melody and concept of Bobby Darin's “Mack the Knife.”
The character stood apart from McDonald's earlier fantasy mascots, who populated the fictional McDonaldland setting. Mac Tonight was built around a specific advertising theme—nighttime dining—and was not presented as a core member of that cast.
The campaign began in 1986 and became highly recognizable through television commercials. Later legal action related to the song contributed to the campaign's withdrawal, but the character remains one of the chain's most distinctive short-lived branding experiments.