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Published

July 18

vr.tr.july-18 · thing-q2730

Let an agent handle July 18 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 July 18 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 July 18 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 July 18, 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 July 18? 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

July 18, day 199 (day 200 in leap years) of the year in the Gregorian calendar, with 166 days remaining in both common and leap years. July 18 is Nelson Mandela International Day, declared by the United Nations on his birthday, and Constitution Day in Uruguay.

Why it exists Filled

Let an agent handle July 18 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The eighteenth day of July
  • 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 Mandela Day or any national observance as a holiday everywhere.
  • Attribute words or acts to Nelson Mandela without a source when marking the day.
  • Repeat unsourced on-this-day claims as fact.
  • Convert historical July 18 dates between Julian and Gregorian calendars without saying so.

Only with a human decision

  • Scheduling legal, financial or school deadlines around a public holiday on July 18 in a given country.

May

  • Give the day number and days remaining for July 18 in the Gregorian calendar.
  • Note Nelson Mandela International Day and Uruguay's Constitution Day with their sources.
  • List historical events on July 18 that are backed by reliable sources.

Moral aspects Filled

  • Mandela Day carries a call to service and justice that should not be reduced to marketing.
  • Constitutional days are part of a nation's identity and must be described accurately.

Who is affected

  • People in Uruguay
  • Communities marking Mandela Day
  • Readers

Owners Filled

Steward

Nobody owns the date; the United Nations and national governments set the observances.

Links to other meta-models Filled

parent

  • Q11185474 - registry parent class

related

  • July - month
  • July 17 - 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.july-18
  • Wikidata: Q2730 (https://www.wikidata.org/wiki/Q2730)
  • ISO 8601: --07-18 recurring date

Direct properties not applicable Not applicable

  • day of year: 199 or 200 day - common year, leap year where different
  • days remaining: 166 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 18 July or July 18
  • ISO format --07-18
  • 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 Q2730: July 18 - identity and sense of the item
  2. Wikipedia: July 18 - 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-q2730/spec.json