Milanković calendar
E125049
The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Milanković calendar canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1086900 — 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: Milanković calendar Context triple: [Revised Julian calendar, alsoKnownAs, Milanković calendar]
-
A.
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.
-
B.
Tychonic system
The Tychonic system is a historical hybrid model of the cosmos in which Earth is stationary at the center while the Sun orbits Earth and the other planets orbit the Sun, proposed as a compromise between geocentric and heliocentric theories.
-
C.
Saros cycle
The Saros cycle is an approximately 18-year period after which nearly identical solar and lunar eclipses repeat, due to the alignment of the Earth, Moon, and Sun.
-
D.
Rudolphine Tables
The Rudolphine Tables are a landmark 17th-century star catalog and set of astronomical tables compiled by Johannes Kepler, renowned for their unprecedented accuracy in predicting planetary positions.
-
E.
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.
- 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: Milanković calendar Target entity description: The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
-
A.
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.
-
B.
Tychonic system
The Tychonic system is a historical hybrid model of the cosmos in which Earth is stationary at the center while the Sun orbits Earth and the other planets orbit the Sun, proposed as a compromise between geocentric and heliocentric theories.
-
C.
Saros cycle
The Saros cycle is an approximately 18-year period after which nearly identical solar and lunar eclipses repeat, due to the alignment of the Earth, Moon, and Sun.
-
D.
Rudolphine Tables
The Rudolphine Tables are a landmark 17th-century star catalog and set of astronomical tables compiled by Johannes Kepler, renowned for their unprecedented accuracy in predicting planetary positions.
-
E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
calendar system
ⓘ
reform of the Julian calendar ⓘ solar calendar ⓘ |
| accuracyComparedToJulian | more accurate than the Julian calendar ⓘ |
| alignmentTarget |
solar year
ⓘ
tropical year ⓘ |
| alsoKnownAs | Revised Julian calendar ⓘ |
| basedOn | Julian calendar ⓘ |
| calendarType | proleptic solar calendar ⓘ |
| countryOfUse |
Albania
ⓘ
Bulgaria ⓘ Cyprus ⓘ Greece ⓘ Romania ⓘ Serbia ⓘ |
| creatorNationality | Serbian ⓘ |
| creatorOccupation | scientist ⓘ |
| designer | Milutin Milanković ⓘ |
| era | 20th century ⓘ |
| field |
astronomy
ⓘ
calendar reform ⓘ chronology ⓘ |
| goal | to reduce long‑term drift between calendar year and tropical year ⓘ |
| hasComponent |
leap years
ⓘ
months ⓘ years ⓘ |
| influencedBy | astronomical calculations of Milutin Milanković ⓘ |
| introducedInCentury | 20th century ⓘ |
| leapYearRule | modification of Julian leap year pattern to reduce drift ⓘ |
| namedAfter | Milutin Milanković ⓘ |
| notUsedFor | Pascha in most Eastern Orthodox churches ⓘ |
| purpose | to align the civil year more accurately with the tropical year ⓘ |
| region | Eastern Europe ⓘ |
| relationToGregorianCalendar | matches Gregorian calendar dates for most practical purposes ⓘ |
| relationToJulianCalendar | revised form with different leap year rules ⓘ |
| religiousContext |
Eastern Orthodox Christianity
ⓘ
surface form:
Eastern Orthodoxy
|
| usedBy |
Orthodox Church of Albania
ⓘ
surface form:
Albanian Orthodox Church
Bulgarian Orthodox Church ⓘ Orthodox Church of Cyprus ⓘ
surface form:
Church of Cyprus
Patriarchate of Constantinople ⓘ
surface form:
Ecumenical Patriarchate of Constantinople
Greek Orthodox Church ⓘ Orthodox Church of the Czech Lands and Slovakia ⓘ Polish Orthodox Church ⓘ Romanian Orthodox Church ⓘ Serbian Orthodox Church ⓘ some Eastern Orthodox churches ⓘ |
| usedFor |
dating of church feasts
ⓘ
fixed feasts in some Eastern Orthodox churches ⓘ liturgical purposes ⓘ |
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: Milanković calendar Description of subject: The Milanković calendar is a 20th-century reform of the Julian calendar, designed by Serbian scientist Milutin Milanković to more accurately align the civil year with the solar year and used by some Eastern Orthodox churches.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.