Sod Ha'ibur

The Hebrew Calendar, the date and rationale of it's true origin. Myths surrounding it. the Babylonian Science upon which it is based. Purpose of the Dehiyyah Molad Zaqen and Lo ADU Rosh. The conflict between Rabban Gamliel and R' Yehoshua and it's aftermath, What the Old Moon had to do with this. Why the New Moon is seldom seen on Rosh HaShanah and never seen without the Rabbinical Postponements.
And most surprisingly what it has to say about Seder Olam.