I came across this bit of bizarre 'coincidence' about 10 years ago.
Its how the days of the month are in perfect harmony with the musical scale.
Start with F# as february, then count the months to the right, like this:
G = March
G# = April,
etc.
All the major notes are the months with 31 days.
All the minors have 30 days.
Except February which is the starting point.
