As in music, So in life. There are 12 notes in music and 12 months in a year. 7 notes in the major scale and 7 days in the week. Coincidence?- evan brewer

Yes. Months and days and weeks are as arbitrarily categorized as notes and scales; some cultures’ music systems have more or less notes depending on what they consider categorically separate pitches.

(Source: cosmicautogenesis)