1teaches us that Nisan is the New Year for kings, and it also teaches us that one day in a year is considered a year; although this king ruled for only one day, a full year is counted toward his reign. The Gemara asks: Consider the next clause of the baraita : But if he ascended to the throne only on the first of Nisan, a year is not counted toward his reign until the next first of Nisan arrives. Isn’t this obvious?
2The Gemara explains: No, it is necessary for a case where the princes agreed to appoint him as king already in the month of Adar. Lest you say that since the decision to appoint him king was made already in Adar, once the first of Nisan arrives they should count it the second year of his reign, therefore the baraita teaches us that the count begins only from when he actually began his rule.
3§ The Sages taught in a baraita : If the king died in the month of Adar and another king succeeded him to the throne in that same Adar, one counts the year to this one, i.e., the previous king, as his final year, and to that one, i.e., the new king who began his reign in Adar. If the first king died in the month of Nisan and another king succeeded him in that same Nisan, one counts the year to this one, the previous king, and to that one, the new king. But if the first king died in Adar and another king succeeded him in Nisan, one counts the first year to the first king as his final year, and the second year to the second king as the first year of his reign.
4The Master said: If the king died in Adar and another king succeeded him to the throne in that same Adar, one counts the year to this one, i.e., the previous king, as his final year, and to that one, i.e., the new king, as the first year of his reign. The Gemara asks: Isn’t this obvious? The Gemara explains: Lest you say that one year cannot be counted toward two kings, and so the entire year should be counted only toward the previous king, the baraita therefore teaches us that the years of two kings can overlap and be counted in a single year.
5The Gemara cites the next phrase of the baraita : If the first king died in Nisan and another king succeeded him in that same Nisan, one counts the year to this one, the previous king, and to that one, the new king. The Gemara asks: Isn’t this obvious? The Gemara explains: Lest you say that when we say that one day in a year is considered a full year, this only applies when the day is at the end of the year, i.e., since his reign will continue in the coming year the day is considered like a whole year, but if the day is at the beginning of the year we should not say that the beginning of Nisan is counted as another year for the previous king; therefore, it teaches us that there is no such a distinction.
6It was further taught in the baraita : But if the first king died in Adar and another king succeeded him in Nisan, one counts the first year to the first king as his final year, and the second year to the second king as the first year of his reign. The Gemara asks: Isn’t this obvious? The Gemara explains: No, it is necessary for a case where the princes decided to appoint him as king in Adar, and he is also a king, son of the previous king, so that his succession to the throne is automatic. Lest you say that by the time the first of Nisan arrives, two years should be counted toward his reign, it therefore teaches us that one counts only from Nisan, when he actually succeeded his father to the throne.
7§ Rabbi Yoḥanan said: From where is it derived that one counts the years of kings’ reigns only from Nisan? As it is stated: “And it came to pass in the four hundred and eightieth year after the children of Israel were come out of the land of Egypt, in the fourth year of Solomon’s reign over Israel, in the month Ziv, which is the second month, that he began to build the house of the Lord” (I Kings 6:1). This verse juxtaposes the reign of Solomon to the exodus from Egypt: Just as one counts the years since the exodus from Egypt from Nisan, when the Jewish people left Egypt, so too, one counts the years of Solomon’s reign from Nisan.
8The Gemara asks: And from where do we derive that we count the years from the exodus from Egypt themselves from Nisan? Perhaps we count them from Tishrei.
9The Gemara answers: It should not enter your mind to say this, as it is written: “And Aaron the priest went up to Mount Hor at the commandment of the Lord, and died there, in the fortieth year after the children of Israel were come out of the land of Egypt, in the fifth month, on the first day of the month” (Numbers 33:38), and it is later written: “And it came to pass in the fortieth year, in the eleventh month, on the first of the month, that Moses spoke to the children of Israel” (Deuteronomy 1:3). From the fact that when the Bible speaks of the month of Av, which is the fifth month, it calls that year “the fortieth year,” and when it speaks of the following Shevat, it also calls that year “the fortieth year,” the implication is that the New Year does not begin in Tishrei. Were it the case that the New Year begins in Tishrei, Av and the following Shevat would not be in the same year because the year would have changed in Tishrei.
10The Gemara raises an objection: Granted, in this case of Aaron’s death it is explicitly stated that the year is counted from the exodus from Egypt, as it states: “In the fortieth year after the children of Israel were come out of the land of Egypt.” But with regard to this other incident of Moses’ oration, from where is it known that the year is counted from the exodus from Egypt? Perhaps it is forty years since the establishment of the Tabernacle in the wilderness.
11The Gemara answers: In accordance with what Rav Pappa said in a different context, that the meaning of one instance of the expression “the twentieth year” may be inferred from another instance of the expression “the twentieth year” by way of a verbal analogy, here too, the meaning of one instance of the expression “the fortieth year” may be inferred from another instance of the expression “the fortieth year” by way of a verbal analogy: Just as here, with regard to Aaron’s death, the count is from the exodus from Egypt, so too, here, with regard to Moses’ oration, although this is not stated explicitly, the count is from the exodus from Egypt.
12The Gemara raises another question: Even if this serves as proof that these two events both took place in the fortieth year from the exodus from Egypt, from where is it known that the incident of Aaron’s death in Av took place first? Perhaps the incident of Moses’ oration in Shevat took place first, in which case it is possible that the years from the Exodus are counted not from Nisan, but from Tishrei.
13The Gemara rejects this argument: It should not enter your mind to say this, as it is written that Moses delivered his oration “after he had slain Sihon” (Deuteronomy 1:4), and when Aaron died Sihon was still alive, as it is written: