The Feast of Trumpets, called Yom Teruah in Hebrew and commonly known as Rosh Hashanah in rabbinic practice, occurs once every Hebrew year on 1 Tishri, an appointed biblical festival that always falls in the first day of the month of Tishri.
Direct answer and civil-date note
Observed annually on 1 Tishri under the Hebrew calendar, the Feast happens once per Hebrew year and never repeats within that same Hebrew cycle.
On the Gregorian civil calendar the date moves each year, landing in either September or October, because the Hebrew calendar is tied to lunar months and is adjusted against the solar year.
Practical takeaway: frequency = once per Hebrew year; check a Hebrew calendar each civil year to find the exact Gregorian date.
Why the festival is fixed to 1 Tishri — scriptural and ritual basis
Scripture names the day: Leviticus 23:23–25 calls for “a day of blowing,” and Numbers 29:1–6 specifies the assembly and trumpet/blowing practice that sets the festival on the first day of Tishri.
The ritual purpose centers on trumpet or shofar blasts as a public summons and memorial; the command ties the observance to the Hebrew month rather than a solar civil year.
Because the biblical instructions attach the festival to the month of Tishri, its frequency follows the Hebrew lunisolar cycle, not the Gregorian calendar.
Hebrew calendar mechanics that make the Feast’s civil date move
The Hebrew calendar is lunisolar: months begin with the new moon and run 29 or 30 days, and the year is adjusted for the solar cycle by adding an extra month, Adar II, in 7 of every 19 years (the Metonic cycle).
Those intercalations and varying month lengths shift 1 Tishri across September and October on the solar (Gregorian) calendar, so the civil date changes even though the festival stays fixed to 1 Tishri.
Since the early medieval period the fixed rabbinic calendar (attributed to Hillel II) sets the pattern predictably; before that, new-month declarations based on sightings made exact civil dates less predictable.
Ancient vs. rabbinic methods of establishing the new month
Originally the Sanhedrin received eyewitness reports of the new moon and publicly declared the start of each month, which could delay or advance festival dates by a day and made annual timing less uniform across regions.
When rabbinic authorities established the fixed calendar, observance on 1 Tishri became predictable everywhere; the frequency remained annual, but communities gained exact calendrical certainty.
Bottom line: the festival was always tied to the Hebrew year; the method of fixing the month’s start changed how predictable the civil date became.
Situations and edge cases — clearing up common confusions
Can the Feast happen more than once a year? No. Under Hebrew reckoning the Feast of Trumpets occurs once in every Hebrew year on 1 Tishri; other biblical trumpet or sounding events in different contexts are separate observances.
Does it ever occur twice in the same Gregorian year? Practically no, because 1 Tishri always falls in September or October and therefore appears once per civil year; two occurrences within the same Gregorian year do not happen.
Different calendar systems (for example, Karaite moon-sighting versus the rabbinic fixed calendar) can produce different civil dates for observance, but not multiple observances within a single Hebrew year.
How different groups name and observe the Feast
Names matter: Feast of Trumpets and Yom Teruah emphasize the biblical command to blow trumpets; Rosh Hashanah highlights rabbinic liturgy and the idea of a new year.
Rabbinic Judaism marks the day with synagogue services, special Torah readings, and prescribed shofar blowing (commonly a sequence totaling traditional counts like 100 blasts, with community variations).
Karaites, some Messianic Jews, and a few Christian groups follow moon-sighting or strictly biblical procedures and so may place the civil observance on slightly different Gregorian dates, while still keeping it once per Hebrew year.
Practical tools: how to find the Feast of Trumpets on your calendar
Use reliable converters and calendars such as Hebcal, Chabad’s calendar, synagogue bulletins, or mainstream Jewish calendar apps to convert 1 Tishri to the Gregorian date for any given year.
Remember that Jewish days begin at sunset: the festival starts at sunset on the evening before 1 Tishri, so add an evening reminder if you plan to observe.
Search terms that return fast results: “1 Tishri [year],” “Yom Teruah date [year],” and “Rosh Hashanah [year]”; those get you the exact civil dates to schedule services or travel.
How the festival’s annual rhythm shapes liturgy and community life
The Feast opens the High Holy Days sequence and sets a yearly focus on themes of repentance, judgment, and renewal; community calendars and synagogue programs are built around that annual anchor.
Practical effects include planning days off, arranging festive meals, scheduling shofar services, and preparing Torah readings and special prayers that recur each year.
The fixed annual timing gives communities a predictable preparation cycle—booking clergy, reserving space, training shofar blowers, and coordinating pastoral care for the Ten Days of Repentance and Yom Kippur.
Common questions and concise answers
Is the Feast of Trumpets the same as Rosh Hashanah? Closely related: the biblical name is Yom Teruah (Feast of Trumpets) on 1 Tishri; rabbinic tradition developed the Rosh Hashanah liturgy and emphasis on the new year, so the two refer to the same annual observance from different perspectives.
Does the shofar get blown every day of the festival? Not exactly: shofar blowing occurs during specific synagogue services on Rosh Hashanah; practices vary by community and by liturgical rules (for example, no shofar on Shabbat in most communities even if it coincides).
Can I celebrate based on sighting the moon? Yes, but with consequences: moon-sighting communities like some Karaites observe based on local visibility, which can shift the civil date; rabbinic communities use the fixed calendar for consistency.
Quick planning checklist for annual observance
1) Consult a Hebrew calendar or trusted site (Hebcal, Chabad, local synagogue) for the Gregorian date of 1 Tishri this year.
2) Mark the festival in your civil calendar and set a reminder for the evening before (Jewish days start at sunset).
3) Find local services and confirm shofar times; learn basic shofar etiquette if you’ll attend.
4) Prepare meals and time off as needed; plan for the Ten Days of Repentance and Yom Kippur that follow.
5) Useful bookmarks and search queries: “Yom Teruah date [year],” “1 Tishri calendar,” and “Feast of Trumpets shofar customs.”
Expect the Feast of Trumpets once every Hebrew year on 1 Tishri; check a Hebrew-to-Gregorian calendar to pin down the exact civil date, and set your plans around the evening start and synagogue schedule.
