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Published

August 13

vr.tr.august-13 · thing-q2776

Let an agent handle August 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 August 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 August 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 August 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 August 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

August 13, day 225 (day 226 in leap years) of the year in the Gregorian calendar, with 140 days remaining in both common and leap years. August 13 is Independence Day in the Central African Republic marking 1960 and International Left-Handers Day, falls within the Obon period in many regions of Japan, and is the anniversary of the start of construction of the Berlin Wall in 1961.

Why it exists Filled

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

Distinguishing features Filled

  • The thirteenth day of August
  • 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

  • Treat the start of the Berlin Wall's construction as a light anniversary.
  • Give Obon dates as fixed, since they vary by region in Japan.
  • Give on-this-day events for August 13 without a source.
  • Present International Left-Handers Day as an official holiday.

Only with a human decision

  • Scheduling commemorations tied to the division of Berlin.

May

  • State that August 13 is day 225 of the Gregorian year, day 226 in leap years.
  • List observances on August 13 with the country or community that holds each one.

Moral aspects Filled

  • The date marks a division that separated families, which remembrance should respect.
  • Obon is a religious observance, not a tourist event.

Who is affected

  • Families divided by the Berlin Wall
  • Japanese communities observing Obon
  • Readers relying on dates

Owners Filled

Steward

Nobody owns a calendar date; each observance is kept by the body or community that declared it.

Links to other meta-models Filled

parent

  • Q11185294 - registry parent class

related

  • August - month
  • August 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.august-13
  • Wikidata: Q2776 (https://www.wikidata.org/wiki/Q2776)
  • ISO 8601: --08-13 recurring date

Direct properties not applicable Not applicable

  • day of year: 225 or 226 day - common year, leap year where different
  • days remaining: 140 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 13 August or August 13
  • ISO format --08-13
  • 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 Q2776: August 13 - identity and sense of the item
  2. Wikipedia: August 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-q2776/spec.json