← Back to catalogue
Published

January 1

vr.tr.january-1 · thing-q2150

Let an agent handle January 1 as a calendar date with weekday computation, observances, legal effects 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 January 1 fall in this year? measurement
  2. Is the year a leap year? boundary

Software

Year boundaries.

Software

Year-boundary handling.

  1. Does software handle the year change and week numbering correctly? boundary
  2. Which ISO week does January 1 fall in? measurement
Observances New Year.

Holiday

Public holiday.

Holiday

New Year Day.

  1. Is January 1 a public holiday here, and what closes? provenance
  2. Is there a substitute day if it falls on a weekend? provenance

Other new years

Calendars.

Other new years

Other new years.

  1. Which communities celebrate the new year on other dates? provenance
  2. When are they this year? measurement
Law Effective dates.

Effective

New rules.

Effective

Laws in force.

  1. Which laws or rates take effect on January 1 this year? provenance
  2. From which official source? provenance

Tax year

Fiscal years.

Tax

Tax year.

  1. Does the tax year start on January 1 here? provenance
  2. What deadlines follow? measurement
History Past events.

Events

On this day.

Events

Historical events.

  1. Which notable events happened on January 1, according to reliable sources? provenance
  2. Are dates in the same calendar? boundary

Origin

Why January.

Origin

Origin.

  1. Why does the year begin on January 1 in the Gregorian calendar? provenance
  2. When did different countries adopt it? provenance

Classifiers Filled

Family
Thing Registry
Category
Cross-cutting context
Entry kind
thing
Plane
XCT
Domain
XCT.TME

What it is Filled

The first day of the year in the Gregorian calendar, with 364 days remaining (365 in leap years), observed as New Year Day and a public holiday in most countries; also observed as the World Day of Peace in the Catholic Church.

Why it exists Filled

Let an agent handle January 1 as a calendar date with weekday computation, observances, legal effects and sourced events.

Distinguishing features Filled

  • First day of the Gregorian year
  • Public holiday in most countries
  • Common effective date for laws
  • Other calendars have different new years

What robots and AI may and may not do Filled

Must not

  • Assume every user celebrates New Year on this day.
  • Schedule work or contact on a public holiday without regard to local rules.

Only with a human decision

  • Scheduling shifts or deadlines on this public holiday.

May

  • Give the date's calendar facts and observances.
  • Note that some cultures mark the new year on other dates.

Moral aspects Filled

  • Holidays reflect cultural and religious traditions that differ between people.
  • Workers have legal rights on public holidays.

Who is affected

  • People observing other calendars
  • Workers

Owners Filled

Steward

Nobody owns a date; governments declare public holidays.

Links to other meta-models Filled

parent

  • Q11186375 - registry parent class
  • Q115675388 - registry parent class
  • Q34812 - registry parent class

related

  • January - month
  • New Year - holiday
  • 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.january-1
  • Wikidata: Q2150 (https://www.wikidata.org/wiki/Q2150)
  • ISO 8601: --01-01 recurring date

Direct properties not applicable Not applicable

  • day of year: 1 day
  • days remaining: 364 or 365 days - common or leap year

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Written 1 January or January 1
  • ISO format --01-01
  • Other calendars start the year on different dates
  • A date on calendars, often marked by celebrations.

Capabilities and actions required Filled

  • compute its weekday in a given year
  • list observances and closures
  • check laws taking effect on January 1
  • find sourced historical events

Hazards and failure modes required Filled

  • Assuming all cultures celebrate the new year on this date
  • Year-boundary software bugs
  • Unsourced events

Standards and interfaces required Filled

  • ISO 8601
  • National public holiday laws

Context of use required Filled

  • Start of the calendar year, holidays and legal effective dates.
  • the recurring calendar date
  • specific dated days in given years

Sources Filled

  1. Wikidata item Q2150: January 1 - identity and sense of the item
  2. Wikipedia: January 1 - general description of the item

Open questions

  • Should dated days be separate entries?
  • How should other new years be linked?
  • How should laws effective on January 1 be tracked?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q2150/spec.json