September
E60409
September is the ninth month of the year in the Gregorian calendar, marking the transition from summer to autumn in the Northern Hemisphere and from winter to spring in the Southern Hemisphere.
All labels observed (2)
| Label | Occurrences |
|---|---|
| September canonical | 4 |
| September equinox | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T484838 — 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: September Context triple: [Linus, hasNameDayInSomeCountries, September]
-
A.
November
November is the eleventh month of the Gregorian calendar, associated in the United States with late autumn, Thanksgiving, and the height of the football season.
-
B.
December
December is the twelfth and final month of the year in the Gregorian calendar, widely associated with winter in the Northern Hemisphere and major holidays such as Christmas and New Year’s Eve.
-
C.
April
April is a spring month in the Gregorian calendar often associated with mild weather and the blooming of many flowers.
-
D.
Cheshvan
Cheshvan is the eighth month of the Hebrew calendar, traditionally noted for having no major Jewish holidays.
-
E.
Maand
Maand is a classical folk music style from Rajasthan, India, known for its expressive melodies and royal courtly associations.
- 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: September Target entity description: September is the ninth month of the year in the Gregorian calendar, marking the transition from summer to autumn in the Northern Hemisphere and from winter to spring in the Southern Hemisphere.
-
A.
November
November is the eleventh month of the Gregorian calendar, associated in the United States with late autumn, Thanksgiving, and the height of the football season.
-
B.
December
December is the twelfth and final month of the year in the Gregorian calendar, widely associated with winter in the Northern Hemisphere and major holidays such as Christmas and New Year’s Eve.
-
C.
April
April is a spring month in the Gregorian calendar often associated with mild weather and the blooming of many flowers.
-
D.
Cheshvan
Cheshvan is the eighth month of the Hebrew calendar, traditionally noted for having no major Jewish holidays.
-
E.
Maand
Maand is a classical folk music style from Rajasthan, India, known for its expressive melodies and royal courtly associations.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
calendar month
ⓘ
month ⓘ |
| associatedZodiacSign |
Libra
ⓘ
Virgo ⓘ |
| containsEvent |
September
self-linksurface differs
ⓘ
surface form:
September equinox
start of meteorological autumn in Northern Hemisphere ⓘ start of meteorological spring in Southern Hemisphere ⓘ |
| etymology | Latin word "septem" meaning "seven" ⓘ |
| follows | August ⓘ |
| hasAbbreviation |
Sep
ⓘ
Sep. ⓘ Sept ⓘ Sept. ⓘ |
| hasBirthFlower |
aster
ⓘ
morning glory ⓘ |
| hasBirthstone | sapphire ⓘ |
| hasCulturalAssociation |
beginning of academic year in many Northern Hemisphere countries
ⓘ
transition from summer to autumn in Northern Hemisphere ⓘ transition from winter to spring in Southern Hemisphere ⓘ |
| hasDayCountRangeInYear |
days 244–273 in common year
ⓘ
days 245–274 in leap year ⓘ |
| hasISO8601MonthCode | 09 ⓘ |
| hasNotableHoliday |
Constitution Day of Mexico
ⓘ
Independence Day of Brazil ⓘ Mexican Independence Day ⓘ
surface form:
Independence Day of Mexico
Labor Day weekend ⓘ
surface form:
Labor Day in the United States
Mid-Autumn Festival in some years ⓘ |
| hasNumberOfDays | 30 ⓘ |
| isInHalf | second half of calendar year ⓘ |
| isInQuarter | third quarter of calendar year ⓘ |
| isInSeasonNorthernHemisphere |
autumn
ⓘ
summer ⓘ |
| isInSeasonSouthernHemisphere |
spring
ⓘ
winter ⓘ |
| isNinthMonthIn |
common year
ⓘ
leap year ⓘ |
| isObservedFor |
back-to-school period in many countries
ⓘ
harvest season in many temperate regions ⓘ |
| partOf |
Gregorian calendar (Western churches)
ⓘ
surface form:
Gregorian calendar
Julian calendar ⓘ |
| positionInYear | 9 ⓘ |
| precedes | October ⓘ |
| typicalEquinoxDateRange | September 22–24 ⓘ |
| typicalSeasonNorthernHemisphereEnd | early autumn ⓘ |
| typicalSeasonNorthernHemisphereStart | late summer ⓘ |
| typicalSeasonSouthernHemisphereEnd | early spring ⓘ |
| typicalSeasonSouthernHemisphereStart | late winter ⓘ |
| wasSeventhMonthIn | Roman calendar ⓘ |
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: September Description of subject: September is the ninth month of the year in the Gregorian calendar, marking the transition from summer to autumn in the Northern Hemisphere and from winter to spring in the Southern Hemisphere.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
September equinox
subject surface form:
St Giles’ Fair