Beitzah 5: What's Special about the Egg?

Who's Who: Rabbi Yochanan ben Zakkai. Now, from the time of the decrees of R. Yochanan ben Zakkai, an egg that wasn't permitted on one day of Rosh Hashanah would indeed be permitted on the second day of Rosh Hashanah. Which leads to a discussion of the calendar differences between witnesses and the math of the calendar. Plus, a recognition of the difference between the Land of Israel, as compared to the Diaspora. And, of course, how it all applies to the egg. Also, why the egg case is specific to Rosh Hashanah, and not a problem for other holidays. Plus, why we trust the courts for sanctifying the new moon, as compared to the egg issue, which is at home.