Jewish New Year     ראש השנה‎     

The Mishnah, the core text of Judaism's oral Torah, contains the first known reference to Rosh Hashanah as the "day of judgment." In the Talmud tractate on Rosh Hashanah it states that three books of account are opened on Rosh Hashanah , wherein the fate of the wicked, the righteous, and those of an intermediate class are recorded. The names of the righteous are immediately inscribed in the book of life, and they are sealed "to live." The middle class are allowed a respite of ten days, until Yom Kippur, to repent and become righteous; the wicked are "blotted out of the book of the living."

Rosh Hashanah is observed as a day of rest (Leviticus 23:24) and the activities prohibited on Shabbat are also prohibited on all Jewish holidays, including Rosh Hashanah. Rosh Hashanah is characterized by the blowing of the shofar, a trumpet made from a ram's horn, intended to awaken the listener from his or her "slumber" and alert them to the coming judgment.^[4] There are a number of additions to the regular Jewish service, most notably an extended repetition of the Amidah prayer for both Shacharit and Mussaf. The traditional Hebrew greeting on Rosh Hashanah is "shana tova",  for "a good year," or "shana tova umetukah" for "a good and sweet year." Because Jews are being judged by God for the coming year, a longer greeting translates as "may you be written and sealed for a good year" (ketiva ve-chatima tovah). During the afternoon of the first day the practice of tashlikh is observed, in which prayers are recited near natural flowing water, and one's sins are symbolically cast into the water. Many also have the custom to throw bread or pebbles into the water, to symbolize the "casting off" of sins.

The term "Rosh Hashana" does not appear in the Torah, but is used in the Hebrew Bible in Ezekiel 40:1 in general reference to the "beginning of the year." Leviticus 23:24 refers to the festival of the first day of the seventh month as "Zicaron Terua" ("a memorial with the blowing of horns"). Numbers 29:1 calls the festival Yom Terua, ("Day of blowing the horn") and defines the nature of animal sacrifices that were to be performed. The Hebrew Bible defines Rosh HaShana as a one-day observance, and since days in the Hebrew calendar begin at sundown, the beginning of Rosh Hashanah is at sundown at the end of 29 Elul. The rules of the Hebrew calendar are designed such that the first day of Rosh Hashanah will never occur on the first, fourth, or sixth days of the Jewish week (ie Sunday, Wednesday or Friday).

Since the time of the destruction of the Second Temple in Jerusalem in 70 CE and the time of Rabban Yohanan ben Zakkai, normative Jewish law appears to be that Rosh Hashanah is to be celebrated for two days, due to the difficulty of determining the date of the new moon.Nonetheless, there is some evidence that Rosh Hashanah was celebrated on a single day in Israel as late as the thirteenth century CE. Orthodox and Conservative Judaism now generally observe Rosh Hashanah for the first two days of Tishrei, even in Israel where most Jewish holidays last only one day. The two days of Rosh Hashanah are said to constitute "Yoma Arichtah" (Aramaic: "one long day"). The observance of a second day is a later addition and does not follow from the literal reading of Leviticus. In Reconstructionist Judaism and Reform Judaism, some communities observe only the first day of Rosh Hashanah, while others observe two days. Karaite Jews, who do not recognize Jewish oral law and rely solely on Biblical authority, observe only one day on the first of Tishrei, since the second day is not mentioned in the Torah.

Laws on the form and use of the shofar and laws related to the religious services during the festival of Rosh Hashanah are described in Rabbinic literature such as the Mishnah that formed the basis of the tractate "Rosh HaShana" in both the Babylonian Talmud and the Jerusalem Talmud. This also contains the most important rules concerning the calendar year.