We discuss a situation where a meal starts on a day requiring an insertion in Birkat HaMazon but the Birkat HaMazon wasn't recited until the day had concluded.

We discuss what happens to a Zimun if some or all of the participants forgot to say critical elements of their Birkat HaMazon.

We summarize many of the Halachot we have learned regarding someone who forgets to say required elements in his or her Birkat HaMazon.

We discuss a person who forgets to mention Shabbat in the Birkat HaMazon of Seudah Shlishit.

We discuss additional possibilities for one who forgets to mention both Shabbat and Rosh Chodesh in his or her Birkat HaMazon.

We discuss a fascinating idea of Rav Elazary in honor of Yom Yerushalayim

We discuss a Shabbat Rosh Chodesh and what happens if one forget Retzeh and/or YaAleh V'YaVo.

The Rama entertains the possibility of adding a missed YaAleh V'YaVo in the HaRachaman section as we do with a missed Al HaNissim.

We continue to discuss a situation where one forgets YaAleh V'YaVo on Rosh Chodesh as well as the make-up insertion. We discuss a situation where we may act similarly on a Yom Tov.

We discuss a situation where one forgets YaAleh V'YaVo on Rosh Chodesh as well as the make-up insertion.