Cited by 3Biblical Studies and InterpretationAncient Near East HistoryHistorical Astronomy and Related Studies

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A 360-Day Administrative Year in Ancient Israel: Judahite Portable Calendars and the Flood Account

Open access
Ben-Dov, Jonathan·2021·Harvard Theological Review

Abstract

Administrators in ancient Judah used schematic 30-day months and a 360-day year alongside other annual frameworks. This year was never practiced as a “calendar” for any cultic or administrative purpose, but rather served as a convenient framework for long-term planning, as well as for literary accounts that were not anchored to a concrete calendar year. Examples for such a usage are attested here from Mesopotamian texts. Material evidence for the 360-day year in Judah comes forth from a series of small perforated bone plaques from various sites in Iron Age Judah. One such item was recently unearthed in the city of David. These objects can reasonably be understood as reflecting a schematic 360-day year, serving as desk calendars for Judahite administrators. Several priestly pentateuchal texts are best understood against this background, such as the dating of some festivals and most notably the dates in the Flood narrative (Gen 7–8). The original dating system is best represented in LXX Gen 7:11, while the reading of MT is a late modification, inserted later, when calendar debates took a central place in the religious discourse. MT is thus a link in a chain of later reworking of this narrative in Second Temple literature. The 360-day year is thus a unique case where material culture dovetails with literary evidence, and may shed light on the material culture of priestly sources. This insight is significant for future studies of biblical time reckoning.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

Ben-Dov argues that Iron Age Judahite administrators used a schematic 360-day year of twelve 30-day months alongside practical calendars, not as a cultic or civil calendar but as a framework for long-term planning and generic literary dates. He links perforated bone plaques from Judah and priestly biblical texts, especially the Flood narrative, to this schematic reckoning.

Key findings

  • Judahite administrators used schematic 30-day months and a 360-day year for long-term calculations and generic time formulas, while the calendar in practice was likely lunar/lunisolar.
  • Nine small perforated bone plaques from Iron Age II Judah—including Lachish, Gezer, Tel el-Farʿah (south), Jerusalem, and ʿAroʿer—can reasonably be read as portable schematic calendars; the ʿAroʿer plaque has one line of twelve holes plus three lines of ten holes, and the Jerusalem plaque has fifteen holes, suggesting a schematic month used twice.
  • Priestly festival dates for Matzot and Sukkot on the fifteenth of the first and seventh months reflect a schematic mid-month placement, not the full moon.
  • In the Flood narrative, LXX Gen 7:11 gives the 27th of month II and Gen 8:14 gives the 27th of month II, making the flood exactly one 360-day year; MT/SP’s 17th in Gen 7:11 is a later modification tied to Second Temple calendar debates.

Methods

  • Combines archaeological analysis of Iron Age Judahite bone plaques with literary and text-critical analysis of biblical calendars and Flood chronology.
  • Compares Judahite material and biblical evidence with Mesopotamian administrative and astronomical uses of a schematic 360-day year.
  • Compares textual versions—MT, LXX, and SP—for the Flood dates, arguing LXX preserves an earlier schematic reading.

Limitations

  • The paper states that not all evidence is conclusive and that the plaques may also have been used with a lunar calendar; schematic use cannot be conclusively proven.
  • It acknowledges that the archaeological part of the argument may not stand on its own, though it claims the Flood chronology analysis stands regardless.
  • The Judahite case is presented as analogous to, not identical with, Mesopotamian practice; the paper does not claim direct continuity with the obsolete Babylonian administrative tradition.

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Integrity signals

Registry

Crossref · 10.1017/s0017816021000298

Cites

0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

57 Own interpretation · 12 No basis given · 6 Own result · 5 Sources not found · 4 Not checked yet · 1 Own method

Show all 49 claims

  • It may state two separate claims as one. 28
  • Probably not a substantial claim. 10
  • The quote only partly states this claim. 1
36 of 36
  • The paper relies on this without support.

    The authors of the priestly flood account did not have concrete archival information about the year of the flood.

    “Since the author or authors obviously did not have concrete archival information on the year of the flood in hoary antiquity”
  • The paper relies on this without support.

    The original form of the priestly flood narrative can be distinguished from later scribal corrections.

    “In the original flood account as attested in the LXX and partly in MT”
2 of 2

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

1 of 1

Citations

Cites

The publisher hasn’t deposited this paper’s reference list.

Research works printed but not linked: 7

  1. Jonathan Ben-Dov, "Calendar and Festivals," The Oxford Encyclopedia of Bible and Law (ed.
  2. Brent A. Strawn; New York: Oxford University Press, 2015) 87-93;
  3. Jon D. Levenson, Esther: A Commentary (OTL; Louisville: Westminster John Knox, 1997) 23-27. https://doi.org/10.1017/S0017816021000298 Published online by Cambridge University Press 44 See Menahem Haran, Temples and Temple Service in Ancient Israel (Oxford: Clarendon Press, 1978) 96, who mentions in this regard the priestly office of peqidim and its derivatives (2 Kgs 11:18; Jer 20:1-2; Ezek 44:11). I thank Jeffrey Stackert for the reference. 45 Haran, Temples and Temple Service, 149. Early readers of the priestly source emphasized this aspect of P while in fact disregarding the literary qualities that do exist in it. A good summary of these views can be found in Sean E. McEvenue, The Narrative Style of the Priestly Writer (AnBib 50; Rome: Biblical Institute Press, 1971) 1-8.
  4. For this notion, see already Hermann Gunkel, Genesis (trans. M. E. Biddle; Macon, GA: Mercer University Press, 1997) 147 (original German edition published in 1901). In this article I will not discuss in detail the various modifications enacted by later Second Temple period authors to the year of the flood, but will rather focus on the versions of the biblical text, mainly MT, LXX, and SP.
  5. Guy Darshan, "The Calendrical Framework of the Priestly Flood Story in Light of a New Akkadian Text from Ugarit (RS 94.2953)," JAOS 136 (2016) 507-14. https://doi.org/10.1017/S0017816021000298 Published online by Cambridge University Press 50 Cryer, "The Interrelationships of Gen 5,32; 11,10-11"; this conclusion is implicitly supported by Martin Rösel, "Die Chronologie der Flut in Gen 7-8: Keine neuen textkritischen Lösungen," ZAW 110 (1998) 590-93;
  6. Albani, "Israels Feste im Herbst," 138. 51 In this article I am concerned with the priestly layer or layers of the flood story and with the final redacted story. In addition to this narrative(s) there is another layer, whose interest in time measuring concentrates on time periods of seven and forty days, but without any interest in months and years. Literature on the identification of these layers and their interrelationship is vast and cannot be covered here. A convenient gateway to this affair is John A. Emerton, "An Examination of Some Attempts to Defend the Unity of the Flood Narrative in Genesis: Part I," VT 37 (1987) 401-20; idem, "An Examination of Some Attempts to Defend the Unity of the Flood Narrative in Genesis: Part II," VT 38 (1988) 1-21; later literature by Reinhard G. Kratz, The Composition of the Narrative Books of the Old Testament (trans. J. Bowden; London: T&T Clark, 2005) 235-36;
  7. Jason M. Silverman; Biblical Intersections 12; Piscataway, NJ: Gorgias Press, 2013) 57-83. The attempts by Najm and Guillaume to bypass this difficulty are not compelling. The authors take the 364-day year as their point of departure, striving to prove that the flood narrative corresponds to a pre-existing 364-day year, instead of searching objectively for the best possible solution. They are thus drawn into circular reasoning, as on pg. 2: "Since the result is not a whole number of weeks, we consider it an unlikely representation of P's system." In "Sifting the Debris," Guillaume is drawn into a set of far-reaching assumptions in order to posit that a sabbatical calendar had underlined the flood account. He assumes that the period of 150 days replaced "a period of two sabbatical seasons of an earlier version" (60; I do not see traces of such periods, however). He further assumes that the 360-day year, which is apparent in the flood account, is the result of a reform in the Persian calendar, between the Egypto-Achaemenid calendar and its Avestan predecessor (65; I do not see any of these calendars in the biblical account and have suggested an indigenous Judahite background). Finally, he explains that the flood was conceived as

Metadata

Authors
Ben-Dov, J.
Venue
Harvard Theological Review
Published
2021-10
Volume
114
Issue
4
Pages
431-450
ISSN
  • 0017-8160 (ISSN-L)
  • 1475-4517
OpenAlex
W3211419576
Cited by
3
References
0
Citations by year
2026: 1 · 2023: 2
FWCI
4.26
Type
journal article
Language
en
Open access
Locations
Harvard Theological Review (publishedVersion, cc-by-nc-sa)
Topics
  • Social Sciences › Arts and Humanities › Religious studies › Biblical Studies and Interpretation
  • Social Sciences › Arts and Humanities › Archeology (arts and humanities) › Ancient Near East History
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Historical Astronomy and Related Studies
Keywords
ancient Judah, Iron Age Judah, flood narrative, Septuagint, Masoretic text, Second Temple literature, Priestly source, David

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CoChat. (2026). Citation check: A 360-Day Administrative Year in Ancient Israel: Judahite Portable Calendars and the Flood Account. https://app.cochat.ai/papers/10.1017/s0017816021000298
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Ben-Dov, J. (2021). A 360-Day Administrative Year in Ancient Israel: Judahite Portable Calendars and the Flood Account. Harvard Theological Review. https://doi.org/10.1017/s0017816021000298