Long Count calendar
E28874
The Long Count calendar is an ancient Mesoamerican timekeeping system, most notably used by the Maya, that tracks days in a linear count from a mythological starting point to record historical and cosmological events.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Long Count calendar canonical | 13 |
How this entity was disambiguated
This entity first appeared as the object of triple T227223 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Long Count calendar Context triple: [Mesoamerica, culturalTrait, Long Count calendar]
-
A.
Julian calendar
The Julian calendar is an ancient solar calendar introduced by Julius Caesar in 45 BCE, historically used throughout Europe and still employed by some Eastern Christian churches for liturgical purposes.
-
B.
ISO 8601
ISO 8601 is an international standard that defines a consistent, unambiguous format for representing dates, times, and related data in numeric form.
-
C.
Revised Julian calendar
The Revised Julian calendar is a modernized version of the traditional Julian calendar, adopted by several Eastern Orthodox Churches to more closely align fixed feast dates with the Gregorian calendar while retaining the Orthodox Paschalion.
-
D.
Metonic cycle
The Metonic cycle is a 19-year astronomical period after which the phases of the Moon recur on the same days of the solar year, forming the basis for many lunisolar calendars.
-
E.
Hebrew calendar
The Hebrew calendar is a lunisolar calendar used primarily for Jewish religious observances, holidays, and the determination of ceremonial dates.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Long Count calendar Target entity description: The Long Count calendar is an ancient Mesoamerican timekeeping system, most notably used by the Maya, that tracks days in a linear count from a mythological starting point to record historical and cosmological events.
-
A.
Julian calendar
The Julian calendar is an ancient solar calendar introduced by Julius Caesar in 45 BCE, historically used throughout Europe and still employed by some Eastern Christian churches for liturgical purposes.
-
B.
ISO 8601
ISO 8601 is an international standard that defines a consistent, unambiguous format for representing dates, times, and related data in numeric form.
-
C.
Revised Julian calendar
The Revised Julian calendar is a modernized version of the traditional Julian calendar, adopted by several Eastern Orthodox Churches to more closely align fixed feast dates with the Gregorian calendar while retaining the Orthodox Paschalion.
-
D.
Metonic cycle
The Metonic cycle is a 19-year astronomical period after which the phases of the Moon recur on the same days of the solar year, forming the basis for many lunisolar calendars.
-
E.
Hebrew calendar
The Hebrew calendar is a lunisolar calendar used primarily for Jewish religious observances, holidays, and the determination of ceremonial dates.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Mesoamerican calendar
ⓘ
calendar system ⓘ chronological system ⓘ |
| allows | absolute dating of events ⓘ |
| appearsOn |
Maya stelae
ⓘ
codices ⓘ monumental inscriptions ⓘ |
| associatedWith |
Maya Creation myth
ⓘ
bʼakʼtun endings ⓘ period-ending rituals ⓘ |
| distinguishedFrom |
260-day ritual calendar
ⓘ
365-day vague year calendar ⓘ Calendar Round ⓘ |
| geographicRegion |
Mesoamerica
ⓘ
southern Maya lowlands ⓘ |
| hasAlternativeCorrelation |
Lounsbury correlation
ⓘ
Spinden correlation ⓘ |
| hasBaseUnit | kʼin (day) ⓘ |
| hasCorrelationConstant | Goodman–Martínez–Thompson correlation ⓘ |
| hasKeyConcept |
cycle of bʼakʼtunim
ⓘ
period-ending ceremonies ⓘ |
| hasLargerUnit |
bʼakʼtun (20 kʼatun = 144,000 days)
ⓘ
kʼatun (20 tun = 7,200 days) ⓘ tun (18 winal = 360 days) ⓘ winal (20 kʼin) ⓘ |
| hasStartingPoint | mythological creation date ⓘ |
| notationStructure | vigesimal positional system with modified third position ⓘ |
| primaryFunction |
commemoration of period endings
ⓘ
cosmological dating ⓘ recording dynastic histories ⓘ recording historical events ⓘ |
| relatedCalendar |
Haabʼ
ⓘ
Tzolkʼin ⓘ
linked to:
Tzolkʼin calendar
|
| startingPointCorrelation |
August 11, 3114 BCE (proleptic Gregorian, Goodman–Martínez–Thompson correlation)
ⓘ
September 6, 3114 BCE (proleptic Julian, GMT correlation) ⓘ |
| startingPointInMayaNotation | 13.0.0.0.0 ⓘ |
| studiedIn |
Maya epigraphy
ⓘ
Mesoamerican archaeology ⓘ archaeoastronomy ⓘ |
| timeSpanCoverage | multi-millennial ⓘ |
| usedBy |
Maya civilization
ⓘ
Mesoamerican cultures ⓘ |
| usedFor | correlating Maya history with Western calendar ⓘ |
| usedTogetherWith | Calendar Round ⓘ |
| usesNumeralSystem |
Maya numerals
ⓘ
vigesimal (base-20) numeral system ⓘ |
| writtenWith |
dot-and-bar numerals
ⓘ
glyphs ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Long Count calendar Description of subject: The Long Count calendar is an ancient Mesoamerican timekeeping system, most notably used by the Maya, that tracks days in a linear count from a mythological starting point to record historical and cosmological events.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.