Speaker: Daniel Michelson (Weizmann Institute)

Title: "The time of birth of Izhak, the Exodus and their implication 
       on the Jewish calendar"

Abstract:
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1. Izhak was born on Nissan 15, year 2049 (Baharad), at the moment when the
   sunray was parallel to a mark on the wall. What was the wall and what was
   the direction of the mark?
   The same question regarding the beginning of "Makat Barad"

2. Sons of Israel left Egypt on Nissan 15, year 2449. At what hour and why?
   How is it related to the Mitzva of Matza?

3. When was the Tkufa of Nissan in year 2449?

4. How the above facts effects the law of intercalation?

5. When was the Molad of Nissan 2449?

6. How is this fact reflected in the rule of "Molad Zaken" and in the
   "Dehiot" (according to Rambam).