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Published

September 26

vr.tr.september-26 · thing-q2885

Let an agent handle September 26 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 26 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 26 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 26, 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 26? 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 26, day 269 (day 270 in leap years) of the year in the Gregorian calendar, with 96 days remaining in both common and leap years. The United Nations observes the International Day for the Total Elimination of Nuclear Weapons on this date, and the Council of Europe marks the European Day of Languages; other observances vary by country and tradition.

Why it exists Filled

Let an agent handle September 26 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The twenty-sixth 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

  • Invent events or birthdays for this date.
  • Use the observance to spread disinformation about nuclear weapons or disarmament.
  • Present observance dates for one country as worldwide.

Only with a human decision

  • Scheduling public campaigns or events that tie into the observance.

May

  • Calculate dates and intervals involving September 26.
  • Explain the International Day for the Total Elimination of Nuclear Weapons and other observances.

Moral aspects Filled

  • The observance concerns weapons that can kill vast numbers of people.
  • Errors in dates of observances spread quickly online.

Who is affected

  • Campaign organisers
  • Survivors of nuclear weapons

Owners Filled

Steward

Nobody: a calendar date; observances are set by the bodies that proclaim them.

Links to other meta-models Filled

parent

  • Q11187341 - registry parent class

related

  • September - month
  • September 25 - 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-26
  • Wikidata: Q2885 (https://www.wikidata.org/wiki/Q2885)
  • ISO 8601: --09-26 recurring date

Direct properties not applicable Not applicable

  • day of year: 269 or 270 day - common year, leap year where different
  • days remaining: 96 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 26 September or September 26
  • ISO format --09-26
  • 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 Q2885: September 26 - identity and sense of the item
  2. Wikipedia: September 26 - 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-q2885/spec.json