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Published

June 30

vr.tr.june-30 · thing-q2657

Let an agent handle June 30 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 30 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 30 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 30, 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 30? 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 30, day 181 (day 182 in leap years) of the year in the Gregorian calendar, with 184 days remaining in both common and leap years. June 30 is Independence Day in the Democratic Republic of the Congo and the last day of the first half of the calendar year, a common end of financial half-years; the United Nations observes International Asteroid Day on this date; other observances vary by country and tradition.

Why it exists Filled

Let an agent handle June 30 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The thirtieth 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

  • Invent events or birthdays for this date.
  • Misstate fiscal or tax deadlines that fall on this date.
  • Treat independence anniversaries with disrespect.

Only with a human decision

  • Filing reports or payments due at a period end.

May

  • Calculate dates and intervals involving June 30.
  • Explain observances such as Independence Day in the Democratic Republic of the Congo and fiscal year ends.

Moral aspects Filled

  • Period-end deadlines carry penalties for individuals and businesses.
  • Independence days mark histories of colonial rule.

Who is affected

  • Taxpayers
  • Citizens of the countries concerned

Owners Filled

Steward

Nobody: a calendar date; governments and institutions set deadlines and holidays.

Links to other meta-models Filled

parent

  • Q11187571 - registry parent class

related

  • June - month
  • June 29 - 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-30
  • Wikidata: Q2657 (https://www.wikidata.org/wiki/Q2657)
  • ISO 8601: --06-30 recurring date

Direct properties not applicable Not applicable

  • day of year: 181 or 182 day - common year, leap year where different
  • days remaining: 184 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 30 June or June 30
  • ISO format --06-30
  • 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 Q2657: June 30 - identity and sense of the item
  2. Wikipedia: June 30 - 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-q2657/spec.json