Babylonian calendar

E339248
ancient calendar system lunisolar calendar

The Babylonian calendar was an ancient lunisolar timekeeping system used in Mesopotamia, structured around lunar months and intercalary months to align with the solar year and influential on later Near Eastern and Jewish calendars.

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All labels observed (5)

Label Occurrences
Babylonian calendar canonical 4
Akkadian calendar 1
Assyrian calendar 1

Statements (48)

Predicate Object
instanceOf ancient calendar system ⓘ
lunisolar calendar ⓘ
adoptedBy Achaemenid Empire ⓘ
aimedToAlignWith solar year ⓘ
alignedWith agricultural seasons in Mesopotamia ⓘ
approximateNumberOfMonthsPerYear 12 ⓘ
associatedWithDeity Sin ⓘ
Šamaš ⓘ
basedOn lunar months ⓘ
developedIn ancient Mesopotamia ⓘ
eraStartAssociatedWith reigns of Babylonian kings ⓘ
hasCalendarType lunisolar ⓘ
hasIntercalaryMonthName Second Addaru ⓘ
Second Ulūlu ⓘ
hasMonthName Abu ⓘ
Addaru ⓘ
Araḫsamna ⓘ
Ayaru ⓘ
Duʾuzu ⓘ
Kislimu ⓘ
Nisannu ⓘ
Simanu ⓘ
Tašrītu ⓘ
Ulūlu ⓘ
Šabāṭu ⓘ
Ṭebētu ⓘ
hasNewYearMonth Nisan ⓘ
surface form: Nisannu
influenced Hellenistic calendrical practice ⓘ
Hebrew calendar ⓘ
surface form: Jewish calendar

later Mesopotamian calendars ⓘ
other Near Eastern calendars ⓘ
intercalationRuleBasis astronomical observations ⓘ
maximumNumberOfMonthsPerYearWithIntercalation 13 ⓘ
monthLengthBasedOn lunar phases ⓘ
recordedOn clay tablets ⓘ
relatedTo Babylonian calendar self-linksurface differs ⓘ
surface form: Assyrian calendar

Seleucid era dating system ⓘ
solarYearApproximation about 365 days ⓘ
standardizedUnder Neo-Babylonian Empire ⓘ
timePeriodOfUse at least 2nd millennium BCE ⓘ
typicalMonthLength 29 or 30 days ⓘ
usedBy Babylonians ⓘ
usedFor administrative purposes ⓘ
agricultural activities ⓘ
religious festivals ⓘ
usedIn Mesopotamia ⓘ
uses intercalary months ⓘ
writtenIn cuneiform script ⓘ

Referenced by (8)

Full triples — surface form annotated when it differs from this entity's canonical label.

Mesopotamian deity Tammuz → calendar → Babylonian calendar ⓘ
subject surface form: Tammuz
Akkadian month Tashritu → usedIn → Babylonian calendar ⓘ
subject surface form: Tashritu
this entity surface form: Akkadian calendar
Akkadian month Tashritu → usedIn → Babylonian calendar ⓘ
subject surface form: Tashritu
Boedromion → usedInCalendar → Babylonian calendar ⓘ
this entity surface form: Attic calendar
northern Babylonia → usedCalendar → Babylonian calendar ⓘ
subject surface form: Northern Babylonia
this entity surface form: Mesopotamian lunisolar calendar
Babylonian calendar → relatedTo → Babylonian calendar self-linksurface differs ⓘ
this entity surface form: Assyrian calendar
Tašrītu → usedIn → Babylonian calendar ⓘ
Tashrītu → usedInCalendar → Babylonian calendar ⓘ