Question:
We are postponing the Seudas Mitzva 2 days due to logistical / technical issues to make it easier for guests from out of town.
I understand from the Yam shel shlomo that we are fulfilling the seudas Mitza with the Derosho and celebrations. Is there a requirement do mark the occasion on the actual birthday (Bo Bayom) in addition and if yes what are the requirements (Minyan, meaty meal, etc.)?
Many thanks
Answer:
Mazal Tov! Your son should grow up to be a big talmid chacham, and enjoy doing the mitzvos.
Essentially the real Bar Mitzva seuda is on the day of his actual Bar Mitzva. You don't need a minyan, and there is no specific obligation to have a meaty meal, but it would be proper for it to be a meal that honors the occasion. We make a nice meal to celebrate the mitzvah of Bris or Pidyon Haben, a Bar Mitzva Seuda essentially is a meal that celebrate all of the mitzvos!
Best wishes