Shofar Blowing on Shabbat: Halachic Debate Over Rosh Hashanah Observance

The question of whether to blow the shofar in Jerusalem when Rosh Hashanah falls on Shabbat is a subject of extensive halachic debate, rooted in differing interpretations of Talmudic and early rabbinic sources. While the Torah mandates shofar blowing on Rosh Hashanah, and the mitzvah itself can override Shabbat, rabbinic decrees aimed to prevent potential Shabbat desecration.

Early authorities like the Ran argued that shofar blowing and bread riddling were not prohibited activities, thus permitting them on Shabbat, especially when necessary for learning. However, the Ramban disagreed, positing that these actions carried a rabbinic prohibition, though they could be permitted for the honor of Shabbat. The core issue stems from a rabbinic decree enacted after the destruction of the Temple. The Gemara states that during the Temple's existence, the shofar was blown on Shabbat, but not in the rest of the country. Rabban Yochanan ben Zakkai later permitted blowing the shofar on Shabbat in any place with a functioning rabbinic court (Beit Din) as a remembrance of the Temple. This decree was primarily to prevent people from carrying the shofar in public spaces to find someone to teach them how to blow it, thereby violating the Torah prohibition of carrying.

Disagreements persist regarding the type of Beit Din required. The Rif suggested that any three ordinary judges would suffice, a view supported by the practical application in his own court. In contrast, the Ritba, based on Rashi's interpretation, insisted on a Sanhedrin (a high court of 23 judges). Maimonides offered a middle ground, requiring three judges who were 'ordained' (S'mikhim), implying a connection to the Sanhedrin. The Shulchan Aruch ultimately ruled against blowing the shofar on Shabbat, a position followed by most later authorities.

However, Rabbi Akiva Eiger and others have argued for the permissibility of blowing the shofar in Jerusalem on Shabbat, even without a Beit Din. This argument is based on Maimonides' interpretation that "the Temple" in the Mishnah referred to all of Jerusalem, suggesting a unique sanctity that might permit shofar blowing. Further arguments include the diminished reality of public domain carrying in modern times and the idea that the prohibition primarily affects the blower, not the listeners who fulfill a Torah mitzvah. These views are largely rejected by the majority of contemporary halachic authorities, who maintain the prohibition against blowing the shofar on Shabbat, even in Jerusalem.