The Perfect Fifth of the Perfect Fifth

In both major and minor scales, the super tonic represents number nine. It may be for this reason that the major second is the only major interval in both major andMinor scales. In spain or greec, friday the thirteenth is t Tuesday the 13th. In italy, the fabled day of bad luck is friday the seventeenth. The european unlucky days seem to represent the diminished fifth. There are seven days, as there are seven degrees of a scale. And so if tuesday represents the second degree of the ale, thesuper tonic, then, of course, we find the diminished fifth in tTuesday e thirteenth.