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Published

September 12

vr.tr.september-12 · thing-q2849

Let an agent handle September 12 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Thing Registry Cross-cutting context XCT.TME
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

Date Calendar facts.

Weekday

Computation.

Weekday

Weekday.

  1. On which weekday does September 12 fall in this year? measurement
  2. Is it a leap year? boundary

Calendar

Julian or Gregorian.

Calendar

Calendar system.

  1. Is the Julian or Gregorian calendar meant? boundary
  2. What is the equivalent date in the other calendar? measurement
Observances Holidays.

Holiday

Public holiday.

Holiday

Holiday status.

  1. Is September 12 a public holiday or observance here? provenance
  2. Which tradition or law sets it? provenance

Attribution

Traditions.

Attribution

Attributed observances.

  1. Which countries or communities observe something on this date, according to them? provenance
  2. Is the observance attributed rather than assumed? boundary
History Past events.

Events

On this day.

Events

Historical events.

  1. Which notable events happened on September 12, according to reliable sources? provenance
  2. Are dates given in the same calendar? boundary

Anniversaries

Recurring.

Anniversaries

Anniversaries.

  1. Which anniversaries fall on this date this year? provenance
  2. Which are round numbers? measurement
Planning Scheduling.

Countdown

Days until.

Countdown

Countdown.

  1. How many days until the next September 12? measurement
  2. From which date? definition

Work

Working day.

Work

Working day.

  1. Is it a working day for this organisation? provenance
  2. Do deadlines move? boundary

Classifiers Filled

Family
Thing Registry
Category
Cross-cutting context
Entry kind
thing
Plane
XCT
Domain
XCT.TME

What it is Filled

September 12, day 255 (day 256 in leap years) of the year in the Gregorian calendar, with 110 days remaining in both common and leap years. September 12 is the Day of the Programmer in leap years, when it is the 256th day, and the anniversary of the relief of Vienna from the Ottoman siege in 1683, of the discovery of the Lascaux cave paintings in 1940, of John F. Kennedy s moon speech at Rice University in 1962, of the overthrow of Haile Selassie in 1974 and of the death of Steve Biko in police detention in 1977.

Why it exists Filled

Let an agent handle September 12 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The twelfth day of September
  • Weekday varies by year
  • Observances vary by place
  • Julian and Gregorian dates differ by 13 days in this era

What robots and AI may and may not do Filled

Must not

  • State that the Day of the Programmer is on September 12 in common years.
  • Present the relief of Vienna in 1683 in a way that stokes hostility toward any people or religion.
  • Attribute on-this-day events to September 12 without a reliable source.
  • Mix Julian dates with the Gregorian date without saying so.

Only with a human decision

  • Changing events or deadlines on this date in a shared calendar.

May

  • State the day number of September 12 and convert it between calendars with the calendar named.
  • Explain that the Day of the Programmer falls on September 12 only in leap years.

Moral aspects Filled

  • Battle anniversaries such as Vienna 1683 are used in present-day hostility toward Muslims.
  • Errors in date facts spread widely and are hard to correct.

Who is affected

  • Readers relying on dates
  • Muslim communities
  • Historians

Owners Filled

Steward

Nobody owns a date; bodies that declare observances answer for them.

Links to other meta-models Filled

parent

  • Q11185262 - registry parent class

related

  • September - month
  • September 11 - date
  • calendar date - category
  • ISO 8601 - notation

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.september-12
  • Wikidata: Q2849 (https://www.wikidata.org/wiki/Q2849)
  • ISO 8601: --09-12 recurring date

Direct properties not applicable Not applicable

  • day of year: 255 or 256 day - common year, leap year where different
  • days remaining: 110 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 12 September or September 12
  • ISO format --09-12
  • Observances vary by country and tradition
  • A date on calendars.

Capabilities and actions required Filled

  • compute its weekday in a given year
  • check local and international observances
  • find sourced historical events
  • schedule events

Hazards and failure modes required Filled

  • Assuming observances are universal
  • Unsourced on-this-day events
  • Mixing Julian and Gregorian dates

Standards and interfaces required Filled

  • ISO 8601
  • National public holiday laws

Context of use required Filled

  • A calendar date for scheduling, holidays and anniversaries.
  • the recurring calendar date
  • specific dated days in given years

Sources Filled

  1. Wikidata item Q2849: September 12 - identity and sense of the item
  2. Wikipedia: September 12 - general description of the item

Open questions

  • Should dated days be separate entries?
  • How should observances be linked?
  • How should events be sourced?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q2849/spec.json