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Published

July 31

vr.tr.july-31 · thing-q2715

Let an agent handle July 31 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 31 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 31 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 31, 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 31? 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 31, day 212 (day 213 in leap years) of the year in the Gregorian calendar, with 153 days remaining in both common and leap years. July 31 is the anniversary of the death of Ignatius of Loyola in 1556 and his feast day, of the start of the Battle of Passchendaele in 1917, of the last Ranger 7 lunar photographs in 1964, of the 1991 START I treaty signing by the United States and the Soviet Union, and of the 2006 handover of power in Cuba from Fidel to Raul Castro; it is also the last day of July.

Why it exists Filled

Let an agent handle July 31 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.

Distinguishing features Filled

  • The thirty-first 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

  • Glorify the losses of Passchendaele or any battle remembered on the date.
  • Treat July 31 as a safe date for tax or filing deadlines without checking the jurisdiction.
  • Present the dates of older events without checking the calendar used.

Only with a human decision

  • Committing filings or payments due at month end on someone's behalf.

May

  • Compute day numbers for July 31 and convert it between calendars.
  • List observances on July 31, such as the feast of Ignatius of Loyola, with sources.

Moral aspects Filled

  • The battle remembered on this date killed hundreds of thousands; memory deserves respect.
  • Religious feasts on the date matter to believing communities.

Who is affected

  • Families of war dead
  • Religious communities
  • People with deadlines

Owners Filled

Steward

Nobody owns a calendar date; it is held in common.

Links to other meta-models Filled

parent

  • Q11187583 - registry parent class

related

  • July - month
  • July 30 - 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-31
  • Wikidata: Q2715 (https://www.wikidata.org/wiki/Q2715)
  • ISO 8601: --07-31 recurring date

Direct properties not applicable Not applicable

  • day of year: 212 or 213 day - common year, leap year where different
  • days remaining: 153 days

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 31 July or July 31
  • ISO format --07-31
  • 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 Q2715: July 31 - identity and sense of the item
  2. Wikipedia: July 31 - 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-q2715/spec.json