Reformation Day
E42143
Reformation Day is a Protestant Christian holiday, observed on October 31 in many countries, that marks Martin Luther’s initiation of the Reformation and the broader movement to reform the Western Church.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Reformation Day canonical | 1 |
| Reformation Festival | 1 |
| Reformation Sunday | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T331696 — 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: Reformation Day Context triple: [Luther Bible, commemoratedOn, Reformation Day]
-
A.
Ascension Day
Ascension Day is a major Christian feast commemorating Jesus Christ’s bodily ascension into heaven, observed on the 40th day of Easter.
-
B.
Pentecostarion
The Pentecostarion is an Eastern Christian liturgical book used in the Byzantine Rite that contains the hymns and services for the period from Easter (Pascha) through the Sunday after Pentecost.
-
C.
King's Day
King's Day is a nationwide Dutch holiday celebrated each April with street festivals, orange-themed festivities, and open-air markets honoring the birthday of the reigning monarch.
-
D.
Reformation
The Reformation was a 16th-century religious movement that challenged the authority and practices of the Catholic Church, leading to the rise of Protestantism and profound political, cultural, and intellectual changes in Europe.
-
E.
Pentecost
Pentecost is a major Christian feast commemorating the descent of the Holy Spirit upon the apostles, often regarded as the "birthday" of the Church.
- 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: Reformation Day Target entity description: Reformation Day is a Protestant Christian holiday, observed on October 31 in many countries, that marks Martin Luther’s initiation of the Reformation and the broader movement to reform the Western Church.
-
A.
Ascension Day
Ascension Day is a major Christian feast commemorating Jesus Christ’s bodily ascension into heaven, observed on the 40th day of Easter.
-
B.
Pentecostarion
The Pentecostarion is an Eastern Christian liturgical book used in the Byzantine Rite that contains the hymns and services for the period from Easter (Pascha) through the Sunday after Pentecost.
-
C.
King's Day
King's Day is a nationwide Dutch holiday celebrated each April with street festivals, orange-themed festivities, and open-air markets honoring the birthday of the reigning monarch.
-
D.
Reformation
The Reformation was a 16th-century religious movement that challenged the authority and practices of the Catholic Church, leading to the rise of Protestantism and profound political, cultural, and intellectual changes in Europe.
-
E.
Pentecost
Pentecost is a major Christian feast commemorating the descent of the Holy Spirit upon the apostles, often regarded as the "birthday" of the Church.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Christian holiday
ⓘ
public holiday ⓘ |
| associatedWithDenomination |
Anglicanism (broadly)
ⓘ
surface form:
Anglicanism
Lutheranism ⓘ Methodism ⓘ Reformed churches ⓘ |
| broaderMovement |
Protestant movement
ⓘ
Reformation ⓘ |
| calendarSystem |
Gregorian calendar (Western churches)
ⓘ
surface form:
Gregorian calendar
|
| category |
Christian holy days
ⓘ
October observances ⓘ |
| commemorates |
Martin Luther’s initiation of the Reformation
ⓘ
Reformation ⓘ
surface form:
Protestant Reformation
|
| commemoratesEvent | posting of the Ninety-five Theses ⓘ |
| commemoratesPerson | Martin Luther ⓘ |
| countrySpecificStatus |
public holiday in Chile
ⓘ
public holiday in Namibia ⓘ public holiday in several German states ⓘ public holiday in some Swiss cantons ⓘ |
| dateObserved | October 31 ⓘ |
| hasAlternativeName |
Reformation Day
ⓘ
surface form:
Reformation Festival
Reformation Day ⓘ
surface form:
Reformation Sunday
|
| keyFigure |
Martin Luther
ⓘ
Philip Melanchthon ⓘ |
| liturgicalColor | red ⓘ |
| observanceShift | some churches transfer observance to the Sunday on or before October 31 ⓘ |
| observedIn |
Austria
ⓘ
Chile ⓘ Germany ⓘ Namibia ⓘ Slovenia ⓘ Switzerland ⓘ parts of the United States ⓘ various Protestant churches worldwide ⓘ |
| originCentury | 16th century ⓘ |
| originCountryHistorical | Electorate of Saxony ⓘ |
| originLocation | Wittenberg ⓘ |
| relatedTo |
Halloween
ⓘ
surface form:
All Hallows’ Eve
All Saints’ Day ⓘ |
| religiousTradition | Protestantism ⓘ |
| theologicalTheme |
authority of Scripture
ⓘ
justification by faith alone ⓘ reform of the Western Church ⓘ |
| typicalPractices |
church services
ⓘ
hymn singing ⓘ reading of Reformation history ⓘ sermons on justification by faith ⓘ |
| typicalYearlyFrequency | annual ⓘ |
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: Reformation Day Description of subject: Reformation Day is a Protestant Christian holiday, observed on October 31 in many countries, that marks Martin Luther’s initiation of the Reformation and the broader movement to reform the Western Church.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Reformation Festival
this entity surface form:
Reformation Sunday