i think that it has to do with the judeo -christian culture instead .12 apostles or a dozen ,60 minutes or 4 dozens ,360 degrees or 30 dozen. A foot 12 inches ..
The 12 is embedded in all old metrics .
anyways that's i explained to a kid the other day .I felt tired to go adn look for the righ answer so i analized it .But may be i'm wrong .I hope the kid won't come back to harm me !!