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Published

October 13

vr.tr.october-13 · thing-q2925

Let an agent handle October 13 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 October 13 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 October 13 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 October 13, 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 October 13? 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

October 13, day 286 (day 287 in leap years) of the year in the Gregorian calendar, with 79 days remaining in both common and leap years. October 13 is the UN International Day for Disaster Risk Reduction and the anniversary of the mass arrest of the Knights Templar in France in 1307 and of the laying of the White House cornerstone in 1792; Catholic tradition also remembers it as the date of the reported Miracle of the Sun at Fatima in 1917.

Why it exists Filled

Let an agent handle October 13 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The thirteenth day of October
  • 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

  • Present the Catholic tradition of the Fatima events as historical fact.
  • Give on-this-day events for October 13 without a source.
  • Confuse the medieval arrest of the Knights Templar with conspiracy claims about it.
  • Convert an October 13 date from a Julian-calendar source without saying so.

Only with a human decision

  • Scheduling events around religious observances tied to the date.

May

  • State that October 13 is day 286 of the Gregorian year, day 287 in leap years.
  • List observances on October 13 with the body or community that holds each one.

Moral aspects Filled

  • Religious tradition and historical record need to be told apart without mocking believers.
  • Templar history is heavily used in conspiracy narratives.

Who is affected

  • Religious communities
  • Readers relying on dates
  • Historians

Owners Filled

Steward

Nobody owns a calendar date; each observance is kept by the body or community that declared it.

Links to other meta-models Filled

parent

  • Q11185294 - registry parent class

related

  • October - month
  • October 12 - 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.october-13
  • Wikidata: Q2925 (https://www.wikidata.org/wiki/Q2925)
  • ISO 8601: --10-13 recurring date

Direct properties not applicable Not applicable

  • day of year: 286 or 287 day - common year, leap year where different
  • days remaining: 79 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 13 October or October 13
  • ISO format --10-13
  • 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 Q2925: October 13 - identity and sense of the item
  2. Wikipedia: October 13 - 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-q2925/spec.json