Antonyms for "made a date" could include: canceled plans, spontaneous invitation, unexpected outing, unplanned rendezvous, impromptu meetup, casual hangout, spur-of-the-moment gathering, unscheduled get-together, random encounter, and ad hoc socializing. These words imply a lack of pre-planning and a more relaxed approach to socializing, allowing for more flexibility and spontaneity in one's social life. While "made a date" suggests a planned and structured event, the antonyms offer ideas for more casual and informal social interactions that can add excitement and variety to one's social calendar.