Description: 
How many days were there in 1752? Is there a year 0? When was there a February 30th? Why did an aluminum company lose $1,000,000 on New Year's Eve? Who thinks 1900 was a leap year? Why is Passover late? Why does Ramadan end early? Does the Chinese calendar follow a 19 year cycle? Why do the Hindus skip days and months? Who would pay for a Martian calendar? In a discussion of history and culture, Nachum Dershowitz, professor of computer science at Tel Aviv University, answers these questions and explains the underpinnings of the major types of calendars in the world.

Runtime:1:09:50

Rating:TV-G