Arukh HaShulchan, Orach Chaim 232:16-233:3

Sugya Map

The vibrant discourse surrounding sha'ah zmanit (halachic hour) is a cornerstone of daily halakha, particularly regarding the timing of Kriyat Shema and Tefillah. The central nafka mina revolves around the precise calculation of these hours: Is a "day" for this purpose defined from aliyah ha'shachar (dawn) to tzeit hakochavim (nightfall, when stars appear), or exclusively from netz hachama (sunrise) to shekiat hachama (sunset)? This seemingly technical distinction profoundly impacts when one may recite Kriyat Shema within its designated "three hours" and Tefillah within its "four hours."

• Issue: Defining the precise start and end points for calculating sha'ot zmaniyot.
• Nafka Mina(s):
  • Sof Zman Kriyat Shema (end time for reciting Shema)
  • Sof Zman Tefillah (end time for Shemoneh Esrei)
  • Zman Kriyat Shema b'shacharit (earliest time for Shema in the morning)
  • Zman Tefillah (earliest time for Shemoneh Esrei)
  • Other zmanim like sfirat ha'omer and mincha gedolah/ketanah.
• Primary Sources:
  • Talmud Bavli: Brachot 9b, Pesachim 58a, Shabbat 131b, Menachot 20b.
  • Rishonim: Rambam (Hilchot Tefillah u'Birkat Kohanim 3:1), Rashi (Brachot 9b s.v. עד תשלום שלש שעות), Rosh (Brachot 1:11), Ran (Brachot 3b dapei haRif s.v. אמר רב יהודה).
  • Acharonim: Gra (Orach Chaim 233 s.v. עד תשלום שלש שעות), Magen Avraham (Orach Chaim 233:1, sk 1), Taz (Orach Chaim 233:1, sk 1), Arukh HaShulchan (Orach Chaim 232:16-233:3).

Text Snapshot

The Arukh HaShulchan, with his characteristic breadth and clarity, navigates this machloket (dispute) with a nuanced hand. He presents the two primary approaches, setting the stage for his eventual psak.

• Arukh HaShulchan, Orach Chaim 232:16-17:

  "מצות קריאת שמע ושאר זמנים שהן בזמנים ידועים, כגון עד שלש שעות או ארבע שעות, הכל הולך אחר שעות זמניות... ודע דכל שעות הללו הן שעות זמניות... ויש בזה שתי דעות, יש אומרים שהוא מתחלת עלות השחר עד צאת הכוכבים... ויש אומרים שהוא מתחלת הנץ החמה עד שקיעת החמה... וכן כתב הרמב"ם... וכן פסק השו"ע בסימן רל"ג סעיף א'." Translation: "The mitzvah of Kriyat Shema and other fixed times, such as until three hours or four hours, all follow sha'ot zmaniyot... And know that all these hours are sha'ot zmaniyot... And there are two opinions on this: some say it is from the beginning of aliyah ha'shachar until tzeit hakochavim... and some say it is from the beginning of netz hachama until shekiat hachama... And so wrote the Rambam... and so ruled the Shulchan Aruch in Siman 233, Seif 1."

The dikduk here is subtle but significant. The phrase "הכל הולך אחר שעות זמניות" (all follows sha'ot zmaniyot) immediately establishes the centrality of this concept. The introduction of "שתי דעות" (two opinions) without immediate preference showcases the profound nature of the machloket. The Aruch HaShulchan then notes that the Rambam and Shulchan Aruch (OC 233:1) explicitly follow the netz-shekiah opinion, which is a powerful chizuk for that side.

• Arukh HaShulchan, Orach Chaim 233:3:

  "ובעיקר הדבר נראה דלכתחלה לכל הדעות יש לחוש להגר"א, שעלות השחר וצאת הכוכבים הוא בכלל יום לענין קריאת שמע ותפלה... וכן נוהגין העולם היום." Translation: "And regarding the essence of the matter, it appears that l'chatchila (ideally) according to all opinions, one should be concerned for the Gra, that aliyah ha'shachar and tzeit hakochavim are included in 'day' for Kriyat Shema and Tefillah... And so the world practices today."

Here, the Aruch HaShulchan pivots. Despite the Rambam and Shulchan Aruch's stance, he introduces the Gra's opinion and ultimately paskens to be machmir (stringent) for it l'chatchila, noting it as the prevalent custom. The phrase "ובעיקר הדבר נראה" (and regarding the essence of the matter, it appears) indicates his own judgment, not merely a recitation of others' views. This demonstrates his commitment to practical halakha and awareness of minhag ha'olam.

Readings

The machloket regarding sha'ah zmanit calculation is foundational, rooted in differing interpretations of "day" in halachic contexts.

Rambam: Hilchot Tefillah u'Birkat Kohanim 3:1 & Hilchot Temidin u'Musafin 3:7

The Rambam unequivocally defines sha'ah zmanit as 1/12th of the time between netz hachama and shekiat hachama. His chiddush lies in his consistent application of this definition. For him, the "day" for sha'ot zmaniyot is strictly the period of visible sunlight. This aligns with a more literal understanding of "day" as opposed to "night" as articulated in Bereishit 1:5 ("ויקרא אלקים לאור יום ולחשך קרא לילה") where light is the defining characteristic of "day"¹. The Rambam implicitly argues that while aliyah ha'shachar might mark the beginning of certain mitzvos like Kriyat Shema, the measurement of time in halachic hours (for their sof zman) only commences with the actual sunrise. This creates a distinction between the zman kiyum (time of performance) for a mitzvah and the zman gemirah (time of completion) measured by sha'ot zmaniyot. For example, Kriyat Shema can be recited from aliyah ha'shachar, but its "three hours" are calculated from netz. This approach necessitates a "non-hourly" portion of the day before netz and after shekiah, which are part of the zman kiyum for certain mitzvos but not subject to sha'ot zmaniyot calculations.

Gra: Orach Chaim 233 s.v. "עד תשלום שלש שעות"

The Gra, in contrast, champions the view that sha'ah zmanit should be calculated from aliyah ha'shachar to tzeit hakochavim. His chiddush is his insistence on a unified definition of "day" for all halachic purposes, especially those tied to specific zmanim. The Gra argues that since Kriyat Shema and other mitzvos can be performed from aliyah ha'shachar, and the Gemara refers to these times as "day," then the sha'ot zmaniyot which measure the sof zman must inherently encompass these twilight periods. He posits that the "day" in halacha is not merely the sun's visible presence but the broader period during which it is considered "day" for mitzvos. The Gra finds support in various gemarot where "day" is used to include aliyah ha'shachar and tzeit hakochavim in contexts beyond just Kriyat Shema². This holistic view avoids the conceptual gymnastics required by the Rambam's approach, where "day" is defined differently for the beginning of a mitzvah versus the measurement of its sof zman. The Gra's opinion is often considered more intuitive in its consistency, treating the halachic "day" as a single, uninterrupted unit for temporal calculations.

The Aruch HaShulchan, while acknowledging the Rambam's prominence and the Shulchan Aruch's psak in OC 233:1, ultimately leans towards the Gra's stringency l'chatchila. This reflects a broader trend in poskim to adopt the chumra when dealing with zmanim, especially for critical mitzvos like Kriyat Shema and Tefillah, ensuring one fulfills the mitzvah according to the earliest possible sof zman.

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¹ Bereishit 1:5. ² See, for example, Pesachim 58a regarding the Korban Pesach.

Friction

The most potent kushya (difficulty) at the heart of this machloket challenges the Rambam's netz-shekiah calculation:

The "Day" of Kriyat Shema Kushya

If sha'ah zmanit is calculated exclusively from netz hachama to shekiat hachama, then the period from aliyah ha'shachar until netz hachama is not part of these measured "hours." Yet, the Gemara in Brachot 9b explicitly states that the mitzvah of Kriyat Shema may be fulfilled "משעלה עמוד השחר" (from aliyah ha'shachar). Furthermore, the Gemara then discusses the sof zman (end time) of Kriyat Shema as "עד שלש שעות" (until three hours). How can Kriyat Shema be performed during a period (from aliyah ha'shachar to netz) that is considered "day" for the mitzvah, if the sha'ot zmaniyot that define its sof zman only begin later? This creates a significant incongruity: the "day" for performing Kriyat Shema seems to start earlier than the "day" for measuring its halachic hours. This kushya is famously raised by the Magen Avraham¹ and the Taz² against the Shulchan Aruch's ruling (which follows the Rambam).

Terutz 1: Two Definitions of "Day" (Rambam's Approach)

The Rambam and his followers resolve this by positing two distinct definitions of "day" in halakha. One definition, a broader "day," encompasses the period from aliyah ha'shachar to tzeit hakochavim, during which certain mitzvos may be performed. The Gemara's statement that Kriyat Shema can be recited from aliyah ha'shachar refers to this broader "day." However, for the specific calculation of sha'ot zmaniyot that determine the sof zman for Kriyat Shema and Tefillah, the "day" is defined more narrowly as the time of visible sunlight, from netz hachama to shekiat hachama. This means that while the chiyuv (obligation) of Kriyat Shema begins at aliyah ha'shachar, the count of the "three hours" only starts with netz. The period between aliyah ha'shachar and netz is thus a "grace period" for performing the mitzvah early, but it doesn't "count" towards the hourly limits. This approach, though seemingly complex, maintains the consistency of the Rambam's definition of sha'ah zmanit as a twelfth of the solar day. The Pnei Yehoshua³ articulates this idea by suggesting that "יום" (day) can refer to "יום גדול" (large day) which includes twilight, and "יום קטן" (small day) which is strictly netz-shekiah, and it is the latter which is used for sha'ot zmaniyot.

Terutz 2: Unified "Day" (Gra's Approach)

The Gra's approach directly addresses this kushya by rejecting the premise of two definitions of "day." For the Gra, the halachic "day" is always a unified period from aliyah ha'shachar to tzeit hakochavim. Therefore, the sha'ot zmaniyot must also be calculated based on this broader definition. The "three hours" for Kriyat Shema and "four hours" for Tefillah begin counting from aliyah ha'shachar. This provides a seamless understanding: if one can perform a mitzvah from aliyah ha'shachar b'yom (during the day), then the measurement of that day's hours must also begin at aliyah ha'shachar. The Gra's position is simpler in its logical consistency, avoiding the need for different definitions of "day" for different halachic purposes within the same context of zmanim. The Aruch HaShulchan's leaning towards the Gra l'chatchila (OC 233:3) suggests he finds this unified approach compelling, or at least prudently stringent.

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¹ Magen Avraham, Orach Chaim 233:1, sk 1. ² Taz, Orach Chaim 233:1, sk 1. ³ Pnei Yehoshua, Brachot 9b, s.v. הא דאמר.

Intertext

The machloket over sha'ot zmaniyot resonates through various layers of halachic literature, reflecting fundamental understandings of time and day.

Tanakh: Bereishit 1:5 ("ויקרא אלקים לאור יום ולחשך קרא לילה")

This foundational verse, "And God called the light Day, and the darkness He called Night," is often cited as a mekor (source) for defining "day." The interpretation hinges on what constitutes "light." Does "light" refer exclusively to direct sunlight (as the Rambam's netz-shekiah view might suggest), or does it encompass the ambient light of dawn and twilight (aligning with the Gra's aliyah ha'shachar to tzeit hakochavim view)? The Rambam's position can be seen as a strict adherence to Or (light) as visible sun. The Gra, however, might argue that the halachic concept of "day" extends beyond the precise moment of sunrise, similar to how tzet hakochavim is considered night even before complete darkness. The Rashba¹, for instance, in discussing Kriyat Shema, grapples with defining "day" and "night," showing that even early authorities found ambiguity in the scriptural definition vis-a-vis halachic zmanim.

Shulchan Aruch, Orach Chaim 233:1

This is the direct mekor for the Aruch HaShulchan's discussion. The Shulchan Aruch states:

"זמן קריאת שמע של שחרית מצותה משיכיר בין תכלת ללבן... וזמנה עד שלש שעות... ויש אומרים עד סוף ארבע שעות... וכל אלו השעות הם שעות זמניות." Translation: "The time for Kriyat Shema of shacharit, its mitzvah is from when one can distinguish between blue and white... And its time is until three hours... And some say until the end of four hours... And all these hours are sha'ot zmaniyot."

Crucially, the Rema adds a gloss here:

"ודעות חלוקות איזהו שעות זמניות; יש אומרים מעלות השחר עד צאת הכוכבים... ויש אומרים מהנץ החמה עד שקיעת החמה." Translation: "And there are differing opinions as to what sha'ot zmaniyot are; some say from aliyah ha'shachar until tzeit hakochavim... and some say from netz hachama until shekiat hachama."

The Shulchan Aruch itself, by stating "עד שלש שעות," implicitly follows the Rambam's netz-shekiah definition, as he typically aligns with the Rambam. The Rema's explicit mention of the machloket confirms that this was a live debate at the time of the Shulchan Aruch's compilation, setting the stage for later poskim like the Aruch HaShulchan to delve deeper and offer a psak l'maaseh (practical ruling). This Shulchan Aruch passage is therefore not just a parallel, but the very springboard from which the Aruch HaShulchan launches his detailed analysis.

Responsa: Igrot Moshe, Orach Chaim, Chelek Aleph, Siman 24

Rav Moshe Feinstein, in his responsa, addresses the practical implications of these two opinions, especially concerning sof zman Kriyat Shema and Tefillah. He acknowledges the weight of both the Magen Avraham (who leans towards Gra) and the Gra himself, and the Taz (who follows Rambam). Rav Moshe often advises following the Gra's opinion (from aliyah ha'shachar to tzeit hakochavim) for sof zman Kriyat Shema l'chumra, ensuring one does not miss the mitzvah according to any valid opinion. However, for sof zman Tefillah, he sometimes leans towards the netz-shekiah calculation, or advises a tefillat tashlumin (compensatory prayer) if one misses the netz-shekiah window but is still within the aliyah ha'shachar to tzeit hakochavim window². This demonstrates how contemporary poskim navigate the machloket, often employing chumra or leniency based on the severity of the mitzvah and the strength of the opinions.

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¹ Rashba, Responsa 1:94. ² Igrot Moshe, Orach Chaim, Chelek Aleph, Siman 24.

Psak/Practice

The machloket concerning sha'ah zmanit calculation has profound implications for daily halachic practice, particularly regarding the timing of Kriyat Shema and Tefillah. The Aruch HaShulchan, while initially presenting the Shulchan Aruch's implied psak (following Rambam's netz-shekiah), ultimately leans towards the Gra's opinion l'chatchila (from aliyah ha'shachar to tzeit hakochavim).

The prevailing practice among many communities, reflecting this chumra, is to adopt the Gra's opinion for sof zman Kriyat Shema and sof zman Tefillah. This means that one ensures they complete these mitzvos by the earlier of the two calculations. For example, if the netz-shekiah calculation yields a later sof zman than the aliyah ha'shachar to tzeit hakochavim calculation, the Gra's earlier time is observed as the deadline. This approach, known as machmir l'shiteihem (being stringent for both opinions), guarantees fulfillment of the mitzvah according to both major views.

Conversely, for the earliest time one can perform Kriyat Shema b'shacharit (known as zman Kriyat Shema), the Gra's opinion, which begins counting from aliyah ha'shachar, generally yields a later actual time when three hours have passed. Therefore, for zman Kriyat Shema b'shacharit, one would also be machmir for the Gra's opinion, waiting until the later sof zman (calculated from aliyah ha'shachar) to ensure the mitzvah is performed in its proper time according to all opinions.

The Aruch HaShulchan's explicit statement, "וכן נוהגין העולם היום" (and so the world practices today) (OC 233:3), is a powerful meta-psak heuristic. It indicates that despite strong textual precedent for the Rambam's view (including the Shulchan Aruch itself), the common practice has shifted to incorporate the Gra's stringency. This highlights the dynamic nature of halakha, where minhag (custom) and chumra can influence the ultimate psak, especially when dealing with fundamental mitzvos and ambiguous temporal definitions.

Takeaway

The machloket over sha'ah zmanit calculation reveals a profound conceptual struggle over the definition of "day" in halakha, with significant practical ramifications for daily zmanim. The Aruch HaShulchan's ultimate psak, favoring the Gra's broader definition l'chatchila, underscores the pervasive chumra in halachic practice to ensure mitzvah fulfillment across differing authoritative opinions.