September
Let an agent explain September as a calendar month, relay length, position, astronomy, etymology and common observances from calendar and cultural sources, and distinguish September from the September equinox, the September 11 attacks as an event and months in other calendars, noting that observances vary by country and year.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What September is.
Definition
Definition.
Definition
Definition.
- What is September, and how does it relate to the September equinox, specific events and months in other calendars? definition
- Is the question about dates, seasons, holidays or etymology? boundary
Days
Days of September.
Days
Days.
- Which days of September have entries, and what day-of-year numbers do they have? measurement
- Which entry fits the specific day? action
Astronomy Astronomy and calendar.
Equinox
Equinox.
Equinox
Equinox.
- Why does the September equinox fall around 22 or 23 September? provenance
- Which references are standard? provenance
Roman
Roman calendar.
Roman
Roman.
- Why is September named for seven when it is the ninth month? provenance
- Which sources are cited? provenance
Culture Observances.
Holidays
Holidays.
Holidays
Holidays.
- Which holidays fall in September, such as Labor Day, Mexican Independence Day and the International Day of Peace? provenance
- Which entry fits International Day of Peace? action
School
School year.
School
School.
- Why does the school year begin in September in many countries? provenance
- Which entry fits academic year? action
Context History.
1752
Calendar change of 1752.
1752
1752.
- Why did September 1752 have eleven days removed in Britain and its colonies? provenance
- Which entry fits Calendar (New Style) Act 1750? action
Seasons
Seasons.
Seasons
Seasons.
- How does September differ between hemispheres? provenance
- Which entry fits autumn? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Information and virtual systems
- Entry kind
- thing
- Plane
- INF
- Domain
- INF.KNW
What it is Filled
The ninth month of the year in the Julian and Gregorian calendars, with 30 days, running from day 244 to day 273 in common years and from day 245 to day 274 in leap years, named from Latin septem, seven, because it was the seventh month of the early Roman calendar, containing the September equinox around 22 or 23 September, and observances such as Labor Day in the United States and Canada on the first Monday, Independence Day in Mexico on 16 September and the International Day of Peace on 21 September; in many countries the school year begins in September.
Why it exists Filled
Let an agent explain September as a calendar month, relay length, position, astronomy, etymology and common observances from calendar and cultural sources, and distinguish September from the September equinox, the September 11 attacks as an event and months in other calendars, noting that observances vary by country and year.
Distinguishing features Filled
- Ninth month
- Contains an equinox
- Name from seventh Roman month
- Start of school year in many countries
What robots and AI may and may not do Filled
Must not
- Assume September is autumn everywhere, ignoring the Southern Hemisphere spring.
- State moveable observances, such as Labour Day in some countries, as fixed dates.
- Equate the month with a single event that happened in it.
Only with a human decision
- Setting school or fiscal year dates that start in September across jurisdictions.
May
- Compute dates and day numbers in September for the Gregorian or Julian calendar.
- Explain why September, from Latin septem, is the ninth month.
Moral aspects Filled
- Reducing a month to one tragedy, such as a terrorist attack, can wound people who lost relatives on other days or in other places.
Who is affected
- Students and schools
- People across hemispheres
Owners Filled
Steward
Nobody owns it; it is part of the civil calendar.
Links to other meta-models Filled
parent
- Q18602249 - registry parent class
related
- month of the Gregorian calendar - in registry terms
- August
- October
contains
- September equinox
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.september
- Wikidata: Q123 (https://www.wikidata.org/wiki/Q123)
Direct properties not applicable Not applicable
- days: 30 count
- day of year range: 244-273 in common years, 245-274 in leap years note
- equinox: around 22 or 23 September date - varies by year and time zone
- ISO 8601 number: 09 code
Plane INF: no invented physical properties.
Recognition optional Filled
- Ninth month of the Gregorian calendar
- September, Sep, Sept
- The September equinox is an astronomical event; September 11 is a specific date; other calendars differ
- Not a visible object; a calendar period.
Capabilities and actions required Filled
- explain position and length
- relay astronomy and etymology
- describe observances
- distinguish related concepts
Hazards and failure modes required Filled
- Assuming Northern Hemisphere seasons
- Stating moveable observances as fixed
- Confusing the month with specific events
Standards and interfaces required Filled
- ISO 8601 date representation
- National public holiday laws
Context of use required Filled
- Organising time within the year.
- days of September
- September observances
- September in different hemispheres
Sources Filled
- Wikidata item Q123: September - identity and sense of the item
- Wikipedia: September - general description of the item
Open questions
- Should observances be linked individually?
- How should calendar sources be linked?
- How should moveable holidays be recorded?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q123/spec.json