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Published

July 13

vr.tr.july-13 · thing-q2687

Let an agent handle July 13 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 13 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 13 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 13, 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 13? 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 13, day 194 (day 195 in leap years) of the year in the Gregorian calendar, with 171 days remaining in both common and leap years. July 13 is Statehood Day in Montenegro, marking the Congress of Berlin recognition of 1878 and the uprising of 1941, and the anniversary of the Live Aid concerts in London and Philadelphia in 1985 and of the start of the New York City draft riots in 1863.

Why it exists Filled

Let an agent handle July 13 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The thirteenth 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 Montenegro's Statehood Day as a holiday everywhere.
  • List events for July 13 without sources.
  • Mix up Julian and Gregorian dates for historical events.
  • Trivialise the New York draft riots and the people they killed.

Only with a human decision

  • Scheduling an action on July 13 that affects others across time zones.

May

  • Give the day number of July 13 in common and leap years.
  • List events on July 13, such as Statehood Day in Montenegro, with sources.

Moral aspects Filled

  • The draft riots included racial violence against Black residents that deserves honest remembrance.

Who is affected

  • People of Montenegro
  • Black communities in New York
  • People who mark the day

Owners Filled

Steward

Nobody owns a date; calendars are held in common.

Links to other meta-models Filled

parent

  • Q11185294 - registry parent class

related

  • July - month
  • July 12 - 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-13
  • Wikidata: Q2687 (https://www.wikidata.org/wiki/Q2687)
  • ISO 8601: --07-13 recurring date

Direct properties not applicable Not applicable

  • day of year: 194 or 195 day - common year, leap year where different
  • days remaining: 171 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 13 July or July 13
  • ISO format --07-13
  • 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 Q2687: July 13 - identity and sense of the item
  2. Wikipedia: July 13 - 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-q2687/spec.json