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Published

May 5

vr.tr.may-5 · thing-q2550

Let an agent handle May 5 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 May 5 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 May 5 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 May 5, 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 May 5? 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

May 5, day 125 (day 126 in leap years) of the year in the Gregorian calendar, with 240 days remaining in both common and leap years. May 5 is Liberation Day in the Netherlands, Children Day in Japan and South Korea, and the anniversary of the Battle of Puebla commemorated as Cinco de Mayo in Mexico and among Mexican Americans; other observances vary by country and tradition.

Why it exists Filled

Let an agent handle May 5 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The fifth day of May
  • 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 the Dutch or East Asian holidays of May 5 as observed everywhere.
  • Conflate the anniversary of the Battle of Puebla with Mexico's independence day.
  • Add on-this-day events for May 5 without a source.
  • Convert a May 5 date from an Old Style record without saying which calendar was used.

Only with a human decision

  • Fixing a legal, contractual or school deadline on May 5 in a jurisdiction where it may be a public holiday.

May

  • Give the day number of May 5 and its weekday in a stated year.
  • List observances on May 5, such as Liberation Day in the Netherlands and Children's Day in Japan and South Korea, naming the country for each.

Moral aspects Filled

  • Liberation Day commemorates the end of occupation and its victims; it deserves accurate and respectful treatment.
  • Treating one country's observance as the norm sidelines others who mark the date differently.

Who is affected

  • People who observe holidays on May 5
  • Readers relying on the date for planning

Owners Filled

Steward

Nobody owns a calendar date; each state sets its own public holidays in law.

Links to other meta-models Filled

parent

  • Q11188066 - registry parent class

related

  • May - month
  • May 4 - 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.may-5
  • Wikidata: Q2550 (https://www.wikidata.org/wiki/Q2550)
  • ISO 8601: --05-05 recurring date

Direct properties not applicable Not applicable

  • day of year: 125 or 126 day - common year, leap year where different
  • days remaining: 240 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 5 May or May 5
  • ISO format --05-05
  • 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 Q2550: May 5 - identity and sense of the item
  2. Wikipedia: May 5 - 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-q2550/spec.json