Editing Rosh Chodesh (section)

===Traditional observances===
On Rosh Chodesh, the prayer [[Yaaleh V'Yavo]] is added to the Ritzeh (or "Avodah") blessing of the [[Amidah]].<ref>{{Cite web |title=Shulchan Arukh, Orach Chayim 422:1 |url=https://www.sefaria.org/Shulchan_Arukh,_Orach_Chayim.422.1?lang=bi&with=all&lang2=en |access-date=2024-11-12 |website=www.sefaria.org}}</ref> In the morning service "half [[Hallel]]" ([[Psalms]] 113–118, with two paragraphs omitted) is recited (except on Rosh Chodesh Tevet, which is during Chanukkah, when the full Hallel is recited). The [[Torah reading|Torah is read]], specifically {{Bibleverse|Numbers|28:1-15|HE}} which includes the [[korban|sacrifices]] of Rosh Chodesh. An additional prayer service, called [[Mussaf]], is added to commemorate the Rosh Chodesh sacrifices in the [[Temple in Jerusalem|Temple]]. Its middle blessing begins "Roshei Chadashim". After the service, many recite Psalm 104.

If Rosh Chodesh falls on [[Shabbat]], the regular [[Torah reading]] is supplemented with a reading of Numbers 28:9-15. The German custom is to sing the Half Kaddish preceding Maftir to a special tune.<ref>For an example, see {{cite web|url=http://www.kayj.net/nusach-internal/Special_Categories-Rosh_Chodesh.html |title=Nusach According to the Ashkenaz Tradition |author=Chazan Michael Friedman |year=2014 |publisher=K’hal Adas Yeshurun |location=Jerusalem}}</ref> In most months (if it does not coincide with another special Haftarah), the regular [[Haftarah]] is replaced by a special Rosh Chodesh Haftarah. The ''Mussaf'' prayer is also modified when Rosh Chodesh falls on Shabbat. The central benediction is replaced with an alternative version (''Ata Yatzarta'') that mentions both the Shabbat and Rosh Chodesh. If Rosh Chodesh falls on a Sunday and not on the Sabbath, the special Haftarah of ''Mahar Chodesh'' ("Tomorrow is the New Moon", [[Books of Samuel|I Samuel]] 20:18-42) is read if it does not coincide with another special Haftarah.

[[Kiddush Levanah]] is recited soon after Rosh Chodesh, although most communities wait until three or seven days after the Molad (the time of the "birth" of the new moon).<ref>Shulach Aruch OC 426:4 and commentaries.</ref>  It is common to wait until Saturday night to recite Kiddush Levanah.<ref>Shulach Aruch OC 426:2</ref>

Many have a custom to eat a special meal in honor of Rosh Chodesh, as recommended by the [[Shulchan Aruch]].<ref>Shulchan Aruch 419</ref> This gives one the opportunity to recite the ''Ya'a'le Ve-Yavo'' in Birkat Hamazon. Some Hasidic Jews sing Psalm 104 during this meal.