The Adventures of Scooterman1972

Dr. Halfbaked:
I decided to make a calendar that is better than any clock in the world. A calendar that can do all kinds of tricks, and can make all kinds of sounds. And... there it is!

[excitedly, Dr. Halfbaked pulls the curtain and presents the calendar. Scooterman and Kickstand stare at it, puzzled:
it shows November 1979, but there are eight days a week; Monday and Tuesday appear twice a week; and Wednesday is missing]

Scooterman:
A crazy calendar!

Kickstand:
I don't know if this is a calendar, but it sure is crazy!

Scooterman:
Dr. Halfbaked, uhm... why there are two Mondays and two Tuesdays? Why can't each day come just once a week?

Dr. Halfbaked:
[points at the clock] Look at the clock. There's an eight o'clock in the morning and an eight o'clock in the evening. There's a nine o'clock twice a day, too. In fact, every hour always comes twice a day. So why can't my calendar be the same? Why can't Monday come twice a week? Why can't Tuesday come twice a week? Or even every day?