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Published

October 27

vr.tr.october-27 · thing-q2956

Let an agent handle October 27 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 27 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 27 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 27, 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 27? 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 27, day 300 (day 301 in leap years) of the year in the Gregorian calendar, with 65 days remaining in both common and leap years. October 27 is the World Day for Audiovisual Heritage, Independence Day in Saint Vincent and the Grenadines, marking 1979, and the historical anniversary of Turkmenistan's independence in 1991 and its former Independence Day holiday date; Turkmenistan now observes Independence Day on September 27.

Why it exists Filled

Let an agent handle October 27 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The twenty-seventh 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

  • Credit a birth, death or event to October 27 without checking a reliable source.
  • Present independence or national days on October 27 from one side only.
  • Treat a Julian date of October 27 as the same day in the Gregorian calendar.

Only with a human decision

  • Publishing an on-this-day list for a wide audience.

May

  • Relay events and observances of October 27, such as the World Day for Audiovisual Heritage, with their sources.
  • Place October 27 in the Gregorian calendar and convert it to other calendars on request.
  • Mark independence anniversaries on October 27 with the country and year.

Moral aspects Filled

  • National days carry pride and grievance; neutral framing matters.
  • Audiovisual heritage is fragile, and the day exists to remind people of that loss.

Who is affected

  • Readers
  • Communities that mark the date

Owners Filled

Steward

Nobody: a calendar date is held in common.

Links to other meta-models Filled

parent

  • Q11187356 - registry parent class

related

  • October - month
  • October 26 - 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-27
  • Wikidata: Q2956 (https://www.wikidata.org/wiki/Q2956)
  • ISO 8601: --10-27 recurring date

Direct properties not applicable Not applicable

  • day of year: 300 or 301 day - common year, leap year where different
  • days remaining: 65 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 27 October or October 27
  • ISO format --10-27
  • 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 Q2956: October 27 - identity and sense of the item
  2. Wikipedia: October 27 - 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-q2956/spec.json