Leszek Kolakowski, 'In Praise of Unpunctuality' in Is God Happy?: Selected Essays (New York: Basic Books, 2013), pp. 219-223 (p .219):
Unpunctuality is the ingrained habit of regularly failing to fulfil people’s expectations regarding the specific time at which certain of our actions will take place, these expectations being the result of assurances on our part, tacit or explicit, regarding that specific time.