All the first born must fast on this day UNLESS they participate in a siyyum, after which it is a mitzvah to eat. It has become a great minhag (custom) to do just that. Rabbi Rank has prepared such a siyyum. We will daven first and then have the siyyum. Total time: 45 minutes. BYOB--Bring Your Own Bagel. You know how to zoom in. The url is zoom.us and Meeting ID is 5169388390.