15 votes
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Me'am Lo'ez on not beginning a new mesechta on Rosh Chodesh

Is the custom practiced today? The רמ"א יו"ד סי' קע"ט סעיף ב [as understood by the פתחי תשובה יו"ד רמ"ה ס"ק ה] writes that our minhag is to start a new מסכת even on Rosh Chodesh. Also, what does ...
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11 votes
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Why don't we say Hallel on Rosh Hashanah?

I once wondered about this and found an answer at Ohr Somayach. They say that Hallel is said with joy and that our focus on judgement precludes this. They cite Rosh Hashanah 32b: אמרו מלאכי השרת ...
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11 votes
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Eidim Zomemim in a case of seeing a new moon

According to Rabbi Akiva Eiger, (Shu"t RA"E Mahadura Kama 176, cited here) they are not punished by the hand of man: וגם משום מלקות, נראה דלא לקו, דלא שייך בזה 'לא תענה ברעך' דהא לא העידו ...
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9 votes
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Why is tefillas Hashlah recommended for Erev Rosh Chodesh Sivan

This is indeed what the Shela (R Yeshaya Horowitz, 1565-1630) writes in his work Shnei Luchot Habrit with the exact words you quote in your question (h/t to @ba for identifying the exact source as ...
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  • 43.7k
8 votes

"Chaparat Pesha" just through Adar II

There are three different minhagim (according to Kaf HaChayim) for the timing of this addition: only during Adar 2, all year long (Cheshvan to Elul), and from Cheshvan to Adar 2. Rabbi Shelomo Min-...
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  • 3,784
8 votes

Are there any sages who have written about experiencing a total solar eclipse?

As the OP asked for “Rabbinic Sefarim” without designating a time period, I’d like to use this space to take note of the Chofetz Chaim’s response to a solar eclipse in Radin (I believe it was the ...
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  • 33.5k
8 votes
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May one shave/haircut on Friday, Rosh Chodesh Iyar

R' Moshe Feinstein (Igros Moshe OC 6, §36) is lenient in the above case. He posits that the prohibition of R' Yehuda HaChassid to shave on a Friday Rosh Chodesh applies only when it was possible to ...
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  • 7,331
8 votes

Where in the rabbinic writings are there examples of the word "Elul" that mean or imply "harvest" and/or "search"?

For the first one: there's an Aramaic term עללתא, meaning "crop" or "harvest" (see Talmud, Nedarim 55a, and Targum Onkelos to Vayikra 25:3). Could be that the Akkadian cognate, if ...
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  • 7,382
7 votes
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What if you forget Ya'aleh V'yavo on the second night of Rosh Chodesh?

The same rule applies both nights (ShA OC 422:1). (Indeed while this seems to be explicit in the Gemara (Brachot 30b), the Beit Yosef (ibid.) notes with amazement that the Orchot Chayim quotes two ...
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7 votes
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Not saying shir shel yom on Rosh Chodesh?

The shul you were attending seemed to have been following the custom of the Vilna Gaon. Rabbi A Grossman has an article entitled The Vilna Gaon’s Psalms for Special Days. Some extracts: ...the ...
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7 votes

What is the shir shel yom for Rosh Hodesh Tevet according to the tradition of the GR"A?

Maaseh Rav 157 (a work documenting the practices of the Vilna Gaon) records the answer according to the tradition you ask about: אין אומרים שיר של יום של יומו ואומרים במקומו בב' ימים דר"ח ברכי נפשי ...
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7 votes
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Source for Rema re: Fasting in Sefer Tanya

The Rema is referring to the sefer Tanya Rabbasi, who writes (siman 34): שבראש חדש אף על פי שאסור להתענות...‏ In general, when sifrei halachah quote "sefer tanya", they are referring to the ...
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  • 5,539
6 votes

Why did the people have to respond twice "It is sanctified" when Sanhedrin declared Rosh Hodesh?

The source of the Rambam is the Mishna, Rosh Hashana 2:7, and Rav Ovadia MiBartenura explains (based on the combination of Rav Pappa and Rav Nachman Bar Yitzchak's opinions in the Gemara Rosh Hashana ...
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  • 31.4k
6 votes

Why Hallel on Rosh Chodesh?

Hallel on Rosh Chodesh says that this is actually a minhag that has been acceptedby Bnai Yisrael to show that the date has kedusha even though it is not required because we are allowed to do melacha. ...
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5 votes
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What do those people who wear tefillin all weekday do on Rosh Chodesh?

Mishnah Berurah (OC 25:60), quoting Ba'er Heiteiv (ibid. 22), (as well as Zera Avraham) quoting Rameh MiPano (Siman 108) writes that he puts them back on immediately after musaf. Mishnah Berurah adds, ...
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  • 5,539
5 votes

Why is the day of Rosh Chodesh announced before every month except Tishrei?

Mishna Berura 417:1 ר"ח וכו' - מנהג קדמונינו לברך את החודש בשבת שלפני ר"ח חוץ מלפני ר"ח תשרי ורמז לזה בכסה ליום חגנו The custom is to bless the new month on the preceding Shabbos, with ...
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5 votes

How accurate is the Molad?

I would recommend having a look at this site. The maths is much too complicated for me, but the upshot is that our molad is two hours later than the molad when the calendar was formulated, and is ...
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5 votes
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Who observes Yom Kippur Katan, and how?

In Yerushalyaim it is common to find minyanim saying it. Furthermore, it is the official practice of the Mir yeshiva to say Yom Kippur Koton. Although the minhag is not widespread being that it is ...
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5 votes

Why did the people have to respond twice "It is sanctified" when Sanhedrin declared Rosh Hodesh?

M'leches Sh'lomo to Sh'kalim 3:3 cites a R. Y'hosef as saying that that's simply how people speak: כן הוא דרך הדבור שהשואל אומר הדבור פעם אחת והמשיב משיב לו שני פעמים וכדומה לזה מצינו גבי קדוש החדש ...
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5 votes
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Why do we mention the Rosh Chodesh korbanot in pesukei dezimra?

To publicize that it's rosh chodesh. Rama, OC 48. (Everyone already knows it's yom tov by yom tov morning. MB there, citing the L'vush. And on Shabas, as you mention in the question, we don't read the ...
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5 votes
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Why is Rosh Chodesh festive?

See the Oruch HaShulchan in סימן תיט - דין סעודת ראש חודש who mentions various reasons why Rosh Chodesh is considered festive: Rosh Chodesh is mentioned in the Torah (Bemidbar 10:10) as one of times ...
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5 votes
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What is the shir shel yom for Rosh Hodesh Tevet according to the tradition of the GR"A?

The popular sidur "תפלת כל פה" has a list of all the red-letter days' daily psalms. It says that 104 is said on rosh chodesh Teves (and also on Shabas rosh chodesh, by the way).
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5 votes
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Shabbos Chanuka - Rosh Chodesh - Torah reading mistake

Read the Beur Halacha commentary on the same page in your link. He explicitly states that even if you make a mistake as the one you listed, the Haftarah is still the Chanukah haftarah. The reason is ...
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5 votes

Musaf verses for Rosh Chodesh on Rosh Hashanah

What you're looking for is ruled in Shulchan Aruch Orach Chaim 591:2. The Shulchan Aruch writes: המנהג פשוט בכל בני ספרד שאין מזכירין פסוקי קרבן מוסף כלל The widespread custom in all the Sefardic ...
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  • 18.5k
5 votes

Why would a malicious declaration of Rosh Hachodesh be legal (R"H 25a)?

The Rambam in Hilchos Kiddush Hachodesh Perek 2, leaves out the option of Meizid, however Tosfos on 22B clearly says that he had the words included in the Gemarah. The Yaavitz in his commentary to ...
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  • 6,322
4 votes
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When did Yom Kippur Kattan originate?

The first record of Yom Kippur Kattan is in the Pri Chadash (Rabbi Chizkiya De-Saluha) to Orach Chaim 417. He attributes it as a custom from the Kabbalist known as the Ramak (Rabbi Moshe Cordovero - ...
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  • 31.4k
4 votes

Why do we mention the Rosh Chodesh korbanot in pesukei dezimra?

R' Eliezer ben Nathan (120) was asked this question. He answered that since Rosh Chodesh is a workday, not everyone will be present in synagogue to hear the Torah reading.
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  • 95.6k
4 votes

Rosh Chodesh at home

You should have a bigger, nicer meal. (Shulchan Aruch Orach Chaim 419) Add hallel in davening and ya'aleh v'yavoh in Shmoneh Esrei and bentching. (SA OC 422 and 424) Some women have the custom of ...
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  • 22.8k
4 votes
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Maleh month with Rosh Chodesh on Shabbos

Yes it does. Nisan, Av, Tishrei, Marcheshvan, Shevat or Adar I can be that way. (OC 428:2)
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