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Published

April 14

vr.tr.april-14 · thing-q2500

Let an agent handle April 14 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 April 14 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 April 14 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 April 14, 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 April 14? 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

April 14, day 104 (day 105 in leap years) of the year in the Gregorian calendar, with 261 days remaining in both common and leap years. Observances on this date vary by country and tradition; several South and Southeast Asian new year festivals fall on or near this date.

Why it exists Filled

Let an agent handle April 14 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The fourteenth day of April
  • 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

  • Fix a festival to April 14 when its date varies with a lunar or solar calendar.
  • Present an event as having happened on April 14 without a source.
  • Merge distinct new year festivals into one tradition.
  • Mix Julian and Gregorian dates for historical events without saying so.

Only with a human decision

  • Scheduling services or events for communities whose new year falls near this date.

May

  • Convert April 14 between calendars and give its day number in common and leap years.
  • Explain that several South and Southeast Asian new year festivals fall on or near April 14 and how their dates are set.
  • List observances with the country or community that keeps each.

Moral aspects Filled

  • New year festivals are central to the identity of many communities and deserve accurate description.
  • Wrong dates can lead people to miss religious and family observances.

Who is affected

  • Communities celebrating new year festivals
  • Travellers and planners
  • Readers of anniversary lists

Owners Filled

Steward

The public: held in common; the Gregorian calendar is a shared convention.

Links to other meta-models Filled

parent

  • Q11185332 - registry parent class

related

  • April - month
  • April 13 - 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.april-14
  • Wikidata: Q2500 (https://www.wikidata.org/wiki/Q2500)
  • ISO 8601: --04-14 recurring date

Direct properties not applicable Not applicable

  • day of year: 104 or 105 day - common year, leap year where different
  • days remaining: 261 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 14 April or April 14
  • ISO format --04-14
  • 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 Q2500: April 14 - identity and sense of the item
  2. Wikipedia: April 14 - 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-q2500/spec.json