Halocho #932 - Shabbat is Erev Rosh Chodesh Kislev

This Sunday is Rosh Chodesh Kislev.

When the 3rd Shabbat meal continues into the night, one still inserts Retzai – רְצֵה  during Birkas Hamazon (grace after meals).

When one starts a meal on Erev Rosh Chodesh and eats a Kezayit (the size of an olive – 27 cc) of bread after dark, one inserts Ya’aleh V’Yavo – יַעֲלֶה וְיָבוֹא into Birkat Hamazon.

What happens when both of the above happen together?

If Rosh Chodesh is on Sunday and one eats a Kezayit of bread after dark during the 3rd Shabbat meal, then one inserts both Retzai – רצה and Ya’aleh V’Yavo – יַעֲלֶה וְיָבוֹא during Birkat Hamazon.

However, some argue that mentioning both is a contradiction – since Shabbat and Rosh Chodesh aren’t on the same day.

Therefore one should be careful not to eat after dark at the 3rd Shabbat meal when Rosh Chodesh is on Sunday.

Source: Kitzur Shulchan Aruch 44:17

Shabbat Shalom and Chodesh Tov

- Danny
Thursday, 27 Marchesvan 5772