The Feast of Trumpets, known in Judaism as Rosh Hashanah (Hebrew: רֹאשׁ הַשָּׁנָה, literally "Head of the Year"), is one of the most significant holidays on the biblical and Jewish calendar. It marks the start of the Jewish civil new year and initiates a solemn period of reflection and repentance.

1. Biblical Origin & Names
Biblical Foundation: Commanded in Leviticus 23:23–25 and Numbers 29:1–6, where God instructs Israel to observe a sacred day of rest on the first day of the seventh month (Tishrei), commemorated with trumpet blasts and sacred assemblies.

Biblical Names:

Yom Teruah (יוֹם תְּרוּעָה): "Day of Blasting" or "Day of the Shofar Blast."

Zikhron Teruah (זִכְרוֹן תְּרוּעָה): "A memorial of blowing trumpets."

Rosh Hashanah: The rabbinic tradition identifies this day as the anniversary of the creation of the world (specifically the creation of Adam and Eve on the sixth day).

2. Core Themes & Significance
Coronation of God as King: The prayers and trumpet blasts are symbolic of an royal fanfare declaring God's sovereignty over the universe.

Day of Judgment (Yom HaDin): Tradition holds that on this day, God opens the Books of Life and Death to evaluate the deeds of humankind over the past year.

Call to Repentance (Teshuvah): Rosh Hashanah begins the Yamim Noraim (the "Days of Awe" or "Ten Days of Repentance"), which culminate on Yom Kippur (the Day of Atonement).

3. Key Rituals & Traditions
The Shofar (Ram’s Horn)
The central commandment (mitzvah) of the day is hearing the sound of the shofar. The horn typically produces four distinct calls:

Tekiah: One long, unbroken sound (a call to attention).

Shevarim: Three medium, broken sounds (resembling weeping/sobbing).

Teruah: Nine or more short, staccato blasts (an urgent wake-up call).

Tekiah Gedolah: One extra-long, final blast of triumph and resolution.

Symbolic Foods (Simanim)
Meals on Rosh Hashanah feature symbolic foods accompanied by blessings for a prosperous year:

Apples Dipped in Honey: For a "sweet new year" (Shanah Tovah U'metukah).

Round Challah: Baked in a circular shape instead of the usual braid, symbolizing the cycle of the year, continuity, and the crown of God.

Pomegranates: Eaten because their many seeds represent the 613 commandments (mitzvot) and abundance of good deeds.

Head of a Fish or Sheep: Symbolizes the prayer that "we may be the head and not the tail" (leaders in righteousness).

Tashlikh (Casting Away)
On the afternoon of the first day (or second day if the first falls on Shabbat), many people walk to a natural body of flowing water (such as a river, lake, or ocean) and symbolically cast away their sins, reciting verses such as Micah 7:19 ("You will cast all our sins into the depths of the sea").

4. Prophetic & Theological Significance
In Jewish Thought: It serves as a personal and universal wake-up call to examine one's spiritual life, repair relationships, and return to God before destiny is sealed on Yom Kippur.

In Christian / Messianic Interpretation: The Feast of Trumpets is frequently viewed typologically as pointing to the end-times:

The sounding of the trumpet preceding the gathering/resurrection of believers (e.g., 1 Corinthians 15:52, 1 Thessalonians 4:16).

The announcement of the Day of the Lord, divine judgment, and the return/coronation of the Messiah.