Why the Calendar Has 365 Days Despite Enoch's Claim
The biblical account of Enoch's life states that he lived 365 years before being taken by God (Genesis 5:23) [1]. This number has been interpreted in various ways throughout Jewish and Christian traditions. One tradition associates the number 365 with the solar year, comprising 365 days.
In Jewish tradition, the number 365 is linked to the solar year in several texts. For instance, the Babylonian Talmud notes that a person vowing to be a nazirite for the number of days in a solar year is to count 365 days (Arakhin 9b.14) [6]. Similarly, Rabbi Yehuda HaNasi interprets the messianic era as lasting 365 years, corresponding to the solar year (Sanhedrin 99a.7) [8].
However, the Jewish calendar is primarily lunar, with years consisting of 12 or 13 lunar months. The Talmud emphasizes that a year is considered to be comprised of either 12 or 13 lunar months, not 365 days (Megillah 64a.9:10) [7]. Maimonides explains that the Jewish calendar is structured in a 19-year cycle, with seven leap years and 12 ordinary years, to approximate the solar year (Mishneh Torah, Sanctification of the New Month 6:10) [2].
The use of a solar year of 365¼ days is acknowledged in various Jewish sources, including the Babylonian Talmud (Eruvin 56a.10) [3]. Julius Africanus, a Christian writer, also notes that the Hebrew year is measured by the lunar month, while the solar year consists of 365¼ days (ANF Vol 6) [4].
The calendar used today is based on the solar year, with 365 days in a year, except for leap years which have 366 days. This solar calendar is not directly derived from Enoch's lifespan but rather from the astronomical observations and calculations that have been refined over time.
The association of Enoch's 365 years with the solar year is an interpretive tradition that highlights the symbolic and theological significance of this number. While the Jewish calendar remains lunar, the solar year has been adopted for civil purposes, reflecting the complexities of calendaring and the various traditions that have shaped our understanding of time [2, 5].
Sources
- Genesis “Genesis 5:23 (BSB) — So Enoch lived a total of 365 years.”
- Mishneh Torah (Maimonides) (Jewish (Rabbinic)) “Mishneh Torah (Maimonides), Mishneh Torah%2C Sanctification of the New Month 6:10: [The fixed calendar is structured in] a nineteen-year cycle, including seven leap years and twelve ordinary years. This is called a machzor . Why was this [structure] chosen? Because when you total the number of days in twelve ordinary years and seven leap years together with their hours and their units, counting all [sums of] 1080 units as an hour, [all sums of] twenty-four hours as a day, and adding them to the number of days, the total will equal nineteen solar years, each of these years being 365 days and si”
- Babylonian Talmud (Jewish (Rabbinic)) “Babylonian Talmud, Eruvin 56a.10: And all this is based on the principle that there are only ninety-one days and seven and a half hours between the beginning of one season and the next, as he assumed that a year is exactly 365¼ days. And similarly, each season begins precisely one-half planetary hour past the beginning of the previous season. There are seven heavenly bodies that are each ascendant for an hour at a time in a constant rotation: Mercury, Moon, Saturn, Jupiter, Mars, the Sun, and Venus. Each season begins half an hour later in this rotation than the previous season.”
- Schaff ANF/NPNF (Patristic) “ANF Vol 6: Gregory Thaumaturgus, Dionysius, Julius Africanus, Methodius, Arnobius — III.--THE EXTANT FRAGMENTS OF THE FIVE BOOKS OF THE CHRONOG- (part 14): in the 20th year of Artaxerxes himself, and the 4th year of the 83d Olympiad, up to this time, which was the 2d year of the 102d Olympiad, and the 16th year of the reign of Tiberius Caesar, there are given 475 years, which make 490 Hebrew years, since they measure the years by the lunar month of 29½ days, as may easily be explained, the annual period according to the sun consisting of 365¼ days, while the lunar period of 12 months has 11¼ d”
- Sefaria (Jewish (Kabbalistic/Philosophical)) “Ramban (Nachmanides) on Genesis 1:14: AND YEARS. The luminaries are to complete their orbit and then traverse again the same course they followed, thus making the solar year consist of 365 days and the lunar year consist of [lunar cycles, each approximately] 30 days.”
- Babylonian Talmud (Jewish (Rabbinic)) “Babylonian Talmud, Arakhin 9b.14: The Gemara raises an objection against Shmuel from a baraita . If one says: I am hereby a nazirite for a duration that is like the number of days in a solar year, he counts 365 days for his term of naziriteship, corresponding to the number of days in a solar year. If he says: Like the days in a lunar year, i.e., a year comprising twelve lunar months, he counts 354 days for his term of naziriteship, corresponding to the number of days in a lunar year. The Gemara explains the objection: And if it is so, that there can be eight full months in a year, there are ti”
- Babylonian Talmud (Jewish (Rabbinic)) “Babylonian Talmud, Megillah 64a.9:10: Having mentioned a teaching of Rabbi Abba in the name of Shmuel, the Gemara cites another of his statements: And Rabbi Abba said that Shmuel said: From where is it derived that one does not count days to make up years, i.e., a year is considered to be comprised of either twelve or thirteen lunar months, and not 365 days? As it is stated: “Of the months of the year” (Exodus 12:2), which indicates that you count months to make up years, but you do not count days to make up years.”
- Babylonian Talmud (Jewish (Rabbinic)) “Babylonian Talmud, Sanhedrin 99a.7: Rabbi Yehuda HaNasi says: The messianic era will last 365 years, corresponding to the number of days of the solar year, as it is stated: “For the day of vengeance is in My heart, and the year of My redeemed is come” (Isaiah 63:4).”