Birkat HaMazon: When To Repeat If Forgot Additions

When saying birkat ha'mazon, you must repeat birkat ha'mazon if you forgot:
  • Retzei on the first two meals of Shabbat.
  • Ya'aleh v'yavo on the first two meals of any Jewish festival day (women only repeat if they forgot it at the Passover seder).
Never repeat birkat ha'mazon if you forgot additions for:
  • Rosh Hashana (during the daytime) or
  • Rosh Chodesh.