In this shiur we discuss: 1) The laws of Yaaleh V'Yavo in Birchas Hamazon [where the meal started on Rosh Chodesh and continued post Rosh Chodesh, or vice versa], 2) Assorted laws related to Rosh Chodesh davening, 3) Announcing "Yaaleh V'Yavo" before shemoneh esrei by Maariv. 4) Using coffee and other drinks for kiddush and havdalah.