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Rosh Hashanah

Rosh Hashanah is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Rosh Hashanah rather than just read about it. In short: Rosh Hashanah (Hebrew: רֹאשׁ הַשָּׁנָה, pronounced [ˌʁoʃ haʃaˈna]; lit. 'head of the year') is the New Year in Judaism. The biblical name for this holiday is Yom Teruah (יוֹם תְּרוּעָה, Yōm Tərūʿā, IPA: [joːm təruːˈʕaː]; lit. 'day of blasting').

Rosh Hashanah — main illustration
Rosh Hashanah — illustration

Key takeaways

  • Rosh Hashanah belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Rosh Hashanah to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Rosh Hashanah from memory before moving on to harder problems.

Reference excerpt

Rosh Hashanah (Hebrew: רֹאשׁ הַשָּׁנָה, pronounced [ˌʁoʃ haʃaˈna]; lit. 'head of the year') is the New Year in Judaism. The biblical name for this holiday is Yom Teruah (יוֹם תְּרוּעָה, Yōm Tərūʿā, IPA: [joːm təruːˈʕaː]; lit. 'day of blasting'). It is the first of the High Holy Days (יָמִים נוֹרָאִים, Yāmīm Nōrāʾīm; lit. 'Days of Awe'), as specified by Leviticus 23:23–25, that occur in the late summer/early autumn of the Northern Hemisphere. Rosh Hashanah begins the Ten Days of Repentance, culminating in Yom Kippur, the day of atonement. It is followed by the festival of Sukkot, which is immediately followed by Shemini Atzeret and Simchat Torah, which end this holiday season. Rosh Hashanah is a two-day observance and celebration that begins on the first day of Tishrei, which is the seventh month of the ecclesiastical year. The holiday itself follows a lunisolar calendar and begins the evening prior to the first day. In contrast to the ecclesiastical lunisolar calendar on the first day of the first month Nisan, the spring Passover month which marks Israel's exodus from Egypt, Rosh Hashanah marks the beginning of the civil year, according to the teachings of Judaism, and is the traditional anniversary of the creation of Adam and Eve, the first man and woman according to the Hebrew Bible, as well as the initiation of humanity's role in God's world. The Sages in the Talmud have characterized the day of Rosh Hashanah as the day that we so to speak crown God as king anew each year. This is effectuated through the Shofar blasts which symbolize the horns sounded at a coronation. It also initiates the ten days of repentance making it an opportune time for repentance. Rosh Hashanah customs include sounding the shofar (a hollowed-out ram's horn), as prescribed in the Torah, following the prescription of the Hebrew Bible to blast a [horn] on Yom Teruah. Eating symbolic foods that represent wishes for a sweet new year is an ancient custom recorded in the Talmud. Other rabbinical customs include attending synagogue services and reciting special liturgy centering around three main themes: Crowning God as king, Shofar blasts, and God remembering us in judgement, as well as enjoying festive meals. "Tashlich", which means "to cast" is a ritual performed any time between the first day of Rosh Hashanah and Hoshana Rabbah. Participants recite specific prayers by water, seeking divine forgiveness by symbolically shaking out their garments and casting away their sins into the depths of the waters. In many communities, this is done by throwing stones or pieces of bread into the water.

Etymology Rosh is the Hebrew word for "head", ha is the definite article ("the"), and shana means year. Thus Rosh Hashanah means "head of the year", referring to the day of the New Year. The term Rosh Hashanah in its current meaning does not appear in the Torah. Leviticus 23:24 refers to the festival of the first day of the seventh month as zikhron teru'ah ("a memorial of blowing [of horns]"). Numbers 29:1 calls the festival yom teru'ah ("day of blowing [the horn]"). The term rosh hashanah appears once in the Bible (Ezekiel 40:1), where it has a different meaning: either generally the time of the "beginning of the year", or possibly a reference to Yom Kippur, or to the month of Nisan. In the prayer books (siddurs and machzors), Rosh Hashanah is also called Yom haZikkaron "the day of remembrance", not to be confused with the modern Israeli remembrance day of the same name.

Origin The origin of the New Year is connected to the beginning of the economic year in the agricultural societies of the ancient Near East. The New Year was the beginning of the cycle of sowing, growth, and harvest; the harvest was marked by its own set of major agricultural festivals. Semitic speakers generally set the beginning of the new year in autumn, while other ancient civilizations chose spring for that purpose, such as the Persians or Greeks or Hindus; the primary reason was agricultural in both cases, the time of sowing the seed and bringing in the harvest. Some scholars posit a connection between the Babylonian festival Akitu and Rosh Hashanah, as there are some striking similarities. The Akitu festival of Ur was celebrated at the beginning of Nisanu (first month), which lasted at least five days, and again in Tashritu, the seventh month, which lasted eleven days. Akitu was also strongly tied to the creation myth of Enuma Elish and the victory of Marduk over the sea monster Tiamat, and the creation of the universe from her corpse. Similarly, it is said that the world was created on Rosh Hashanah. Another view is that the birth of mankind, and by extension the anniversary of the worlds creation, along with its significance as a day of coronation of God, was a tradition passed down from Adam and Eve who were created on that day. They passed it down through the generations until it was finally recorded in the Talmud.

… excerpt ends here. Continue reading the full article.

Illustrations

Rosh Hashanah illustration
Rosh Hashanah: Rosh Hashanah symbolism, inspired by "Unetanneh Tokef", in a synagogue in Jerusalem
Rosh Hashanah symbolism, inspired by "Unetanneh Tokef", in a synagogue in Jerusalem
Rosh Hashanah: Jewish elder blowing the ram's horn (shofar)
Jewish elder blowing the ram's horn (shofar)
Rosh Hashanah: Apples dipped in honey are eaten on Rosh Hashanah to symbolise the wish for a sweet and happy new year
Apples dipped in honey are eaten on Rosh Hashanah to symbolise the wish for a sweet and happy new year
Rosh Hashanah: Traditional Rosh Hashanah foods: apples and honey, dates, pomegranates, leeks, sweet carrots, spinach, gefilte fish and more
Traditional Rosh Hashanah foods: apples and honey, dates, pomegranates, leeks, sweet carrots, spinach, gefilte fish and more

Worked examples

Example 1 — a first encounter with Rosh Hashanah

Start with the simplest possible case. Write down what Rosh Hashanah claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rosh Hashanah before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rosh Hashanah ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rosh Hashanah

In research
Rosh Hashanah appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Rosh Hashanah in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Rosh Hashanah is common in secondary-school and first-year university syllabi. It links to neighbouring topics Adam and Eve, Autumn equinox, Autumn festivals, so understanding it makes those chapters shorter.
In everyday life
Look for Rosh Hashanah outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Rosh Hashanah in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Rosh Hashanah means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Rosh Hashanah out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rosh Hashanah in simple terms?

Rosh Hashanah (Hebrew: רֹאשׁ הַשָּׁנָה, pronounced [ˌʁoʃ haʃaˈna]; lit. 'head of the year') is the New Year in Judaism. The biblical name for this holiday is Yom Teruah (יוֹם תְּרוּעָה, Yōm Tərūʿā, IPA: [joːm təruːˈʕaː]; lit. 'day of blasting').

Why does Rosh Hashanah matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rosh Hashanah?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rosh Hashanah.

Tags

  • Adam and Eve
  • Autumn equinox
  • Autumn festivals
  • Hebrew words and phrases in Jewish law
  • New Year celebrations
  • Rosh Hashanah
  • Tishrei observances

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