What with last Thursday having been Leap Day, with the leap month of Adar II beginning on Saturday evening with Rosh Chodesh, and the Muslim month of Ramadan beginning on Monday, I thought it would be interesting to leap into a discussion of how the secular and Jewish calendars we use today came to be. Did you know, for example, that there was one year that was 445 days long? Do you know why there is a leap day in the secular calendar, a leap month in the Jewish calendar, or why Ramadan and the other 11 Islamic months regress every 32.5 solar years through the entire secular calendar? Support the show