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Published

September 23

vr.tr.september-23 · thing-q2888

Let an agent handle September 23 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 23 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 23 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 23, 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 23? 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 23, day 266 (day 267 in leap years) of the year in the Gregorian calendar, with 99 days remaining in both common and leap years. September 23 is Saudi National Day and the International Day of Sign Languages, and falls on or near the September equinox.

Why it exists Filled

Let an agent handle September 23 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The twenty-third 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 the equinox falls on September 23 every year without checking the year and time zone.
  • Present Saudi National Day as a holiday everywhere.
  • Describe the International Day of Sign Languages in a way that treats sign languages as lesser languages.

Only with a human decision

  • Scheduling obligations for others on a date that is a holiday in their country.

May

  • List events and observances of September 23, naming the country or body that marks each.
  • Note that the September equinox falls on or near this date and varies by year and time zone.

Moral aspects Filled

  • Deaf communities fought for sign languages to be recognised as full languages.
  • National days carry political meaning for citizens and for minorities within the state.

Who is affected

  • Deaf people and sign language users
  • Residents of Saudi Arabia
  • People planning around the date

Owners Filled

Steward

Nobody: a calendar date held in common.

Links to other meta-models Filled

parent

  • Q11187283 - registry parent class

related

  • September - month
  • September 22 - 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-23
  • Wikidata: Q2888 (https://www.wikidata.org/wiki/Q2888)
  • ISO 8601: --09-23 recurring date

Direct properties not applicable Not applicable

  • day of year: 266 or 267 day - common year, leap year where different
  • days remaining: 99 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 23 September or September 23
  • ISO format --09-23
  • 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 Q2888: September 23 - identity and sense of the item
  2. Wikipedia: September 23 - 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-q2888/spec.json