תהלים, פרק פ״א, פסוק ד׳

A piercing blast cuts through the air at the start of the month, signaling a profound moment of renewal and hidden destinies. When the moon is barely a sliver in the night sky, a call goes out to gather and recognize the weight of this appointed time. The primary approach among commentators is that this gathering takes place on the first day of the month, specifically the first of Tishrei, known as Rosh Hashanah [רש״י, רד״ק, אבן עזרא, מצודת דוד, מלבי״ם, מאירי, ביאור שטיינזלץ]. On this day, there is a clear commandment to sound the horn.

The Talmud derives the very foundations of the holiday's prayers from this gathering, establishing the core themes of God's Kingship, Remembrance, and the sounding of the horn [תורה תמימה]. Beyond its role in prayer, the blast serves as a powerful symbol of freedom, recalling the exact day the ancestors were finally relieved from their crushing slave labor in Egypt [רד״ק]. The Talmudic sages also reveal that this day carries immense historical and cosmic weight. It is the day the entire world stands in judgment, the moment when a person's sustenance for the coming year is decided, and historically, the day Joseph was released from his Egyptian prison [תורה תמימה].

The nature of this specific date is a subject of discussion. The primary approach among commentators is that the timing simply refers to a fixed, appointed festival [רש״י, רד״ק, אבן עזרא, מצודת ציון, מצודת דוד, מלבי״ם, תורה תמימה]. However, another perspective suggests the timing is deeply connected to the concept of concealment. Rosh Hashanah is the only major festival that falls on a new moon, a time when the moon is completely covered and hidden from human sight [תורה תמימה, אבן עזרא, מנחת שי, ביאור שטיינזלץ].

This idea of concealment reveals a deeper truth about the nature of the holiday. One might wonder why a festival is marked by the raw, broken sound of an animal horn—a sound of submission—rather than the joyful music of harps and stringed instruments. The answer lies in the hidden nature of the day. Because it is a time of serious judgment, the outcome of that trial remains covered and unknown. The victory of this judgment is not revealed until the later festival of Sukkot. During that subsequent holiday, the Israelites take up palm branches, proudly holding them like a victorious army displaying the weapons of their King, signaling that they have emerged triumphant in their trial before God [אלשיך].

In a similar vein, the hidden nature of the new moon serves as the starting point for calculating the exact date of that later festival [מאירי]. Ultimately, the gathering looks toward a well-known and established holiday [רד״ק], with the joyous celebrations culminating in the preparation of the festival sacrifices [אבן עזרא].