Calendar Crisis?
Very interesting article by Rabbi Michael Broyde that does a great job of introducing the parameters of our calendar. It also addresses “calendar creep” where Pesach is getting later and later each year.
Slonimski’s Work
The first author to conclude that our calendar was based on the Almagest. Link goes to Google Books digitized version from Harvard Library.
History of our calendar
A Short History of the Jewish Fixed Molad: The Origin of the Molad by J.Jean Ajdler from Hakirah
History of our calendar
Bircas HaChamah and Calendar Mathematics: Precision, Simplicity and Conflict by Sheldon Epstein, Bernard Dickman and Yonah Wilamowsky from Hakirah
History of our calendar
The Beginning of the Jewish Calendar by Bernard Dickman from Hakirah
על הכרזת המולד בבתי הכנסת
Why do we announce the Molad before Birkat HaHodesh? Hebrew article by Yakov Loewinger from Hakirah