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Published

June 28

vr.tr.june-28 · thing-q2660

Let an agent handle June 28 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 June 28 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 June 28 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 June 28, 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 June 28? 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

June 28, day 179 (day 180 in leap years) of the year in the Gregorian calendar, with 186 days remaining in both common and leap years. June 28 is the anniversary of the 1914 assassination in Sarajevo and of the 1919 Treaty of Versailles, and is observed as a memorial day in some countries.

Why it exists Filled

Let an agent handle June 28 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The twenty-eighth day of June
  • 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 memorial observances on June 28 as universal.
  • Publish on-this-day events for June 28 without a source.
  • Mix Julian and Gregorian dates, for example for older Balkan events.
  • Use the June 28 anniversaries to inflame national or ethnic grievance.

Only with a human decision

  • Scheduling public events on June 28 in places where it is a day of remembrance.

May

  • State the day number of June 28 in common and leap years.
  • List anniversaries on June 28, such as the Sarajevo assassination and the Treaty of Versailles, with sources.
  • Convert June 28 dates between Julian and Gregorian calendars where relevant.

Moral aspects Filled

  • June 28 carries anniversaries of war and memory that remain sensitive in the Balkans.
  • Wrong dates attached to historical events spread quickly through on-this-day lists.

Who is affected

  • Readers relying on dates
  • Communities marking memorials
  • Historians

Owners Filled

Steward

Nobody: a calendar date held in common; national authorities set observances.

Links to other meta-models Filled

parent

  • Q11187366 - registry parent class

related

  • June - month
  • June 27 - 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.june-28
  • Wikidata: Q2660 (https://www.wikidata.org/wiki/Q2660)
  • ISO 8601: --06-28 recurring date

Direct properties not applicable Not applicable

  • day of year: 179 or 180 day - common year, leap year where different
  • days remaining: 186 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 28 June or June 28
  • ISO format --06-28
  • 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 Q2660: June 28 - identity and sense of the item
  2. Wikipedia: June 28 - 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-q2660/spec.json