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Published

week

vr.tr.week · thing-q23387

Let an agent handle weeks with their start day and numbering convention, and resolve relative expressions such as this week and next week.

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

Convention Start day and numbering.

Start day

Monday or Sunday.

Start day

The first day of the week.

  1. Which day starts the week here? definition
  2. Does the context use ISO 8601? provenance

Numbering

ISO or local week numbers.

Week number

The numbering scheme.

  1. Which week number is this, under which scheme? measurement
  2. Does the year have 53 weeks? boundary
Relative references This week, next week.

Reference date

Anchor.

Anchor

The date relative expressions refer to.

  1. Relative to which date is next week meant? definition
  2. In which time zone? boundary

Resolution

Mapping to dates.

Resolved range

The dates covered.

  1. Which exact dates does this expression cover? measurement
  2. How should ambiguity be confirmed with the user? action
Work and law Working weeks.

Working week

Days and hours.

Working week

Working days and hours.

  1. Which days are working days here? definition
  2. What maximum weekly hours apply? boundary

Holidays

Public holidays in the week.

Holidays

Holidays affecting the week.

  1. Which public holidays fall in this week? provenance
  2. How do they affect deadlines? boundary
Designated weeks Themed and special weeks.

Themed weeks

Awareness and events.

Designation

Who designated the week.

  1. Who designated this week, and for what? provenance
  2. Do its dates change each year? boundary

Calendar systems

Intercalary weeks.

Calendar

Special weeks in calendars.

  1. Does the calendar insert an extra week? definition
  2. How is it numbered? definition

Classifiers Filled

Family
Thing Registry
Category
Cross-cutting context
Entry kind
thing
Plane
XCT
Domain
XCT.TME
Other names and narrower kinds
thematic week, intercalary week, international week, last full week of October, 19th-26th September, this week, next week, week after the next, week 32, week 33, week 34, week 35

What it is Filled

A period of seven consecutive days, used as a cycle for work, rest and scheduling, with numbering conventions such as ISO 8601 weeks.

Why it exists Filled

Let an agent handle weeks with their start day and numbering convention, and resolve relative expressions such as this week and next week.

Distinguishing features Filled

  • Seven days, not tied to astronomy
  • Start day differs: Monday in ISO 8601, Sunday in some countries
  • Week numbering differs between conventions
  • Themed weeks and intercalary weeks are special uses

What robots and AI may and may not do Filled

Must not

  • Assume a week start day without checking the locale or convention.
  • Mishandle week 53 or weeks crossing a year boundary.
  • Act on an ambiguous relative week expression in a commitment.

Only with a human decision

  • Scheduling commitments for others based on an ambiguous week.

May

  • Calculate week numbers and dates, stating the convention and the first day of the week.
  • Resolve relative expressions such as next week with the user before acting on them.

Moral aspects Filled

  • Working weeks and rest days embody hard-won rights and religious observance.

Who is affected

  • Workers
  • People who keep a weekly day of rest

Owners Filled

Steward

Nobody owns the week; standards bodies define week numbering.

Links to other meta-models Filled

parent

  • Q186081 - registry parent class
  • Q29441572 - registry parent class

related

  • day - seven days
  • year - weeks in a year
  • time - a unit of time
  • working week - fewer days

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.week
  • Wikidata: Q23387 (https://www.wikidata.org/wiki/Q23387)
  • ISO week date: YYYY-Www-D ISO 8601 week date

Direct properties not applicable Not applicable

  • length: 7 days
  • ISO weeks per year: 52 or 53 weeks

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Calendar rows of seven days
  • Week numbers such as 2026-W37
  • Phrases such as this week or next week, which depend on the reference date
  • Not visible; shown as rows in calendars and week numbers.

Capabilities and actions required Filled

  • number it, under ISO 8601 or local conventions
  • schedule by it
  • resolve relative references, such as next week
  • designate themed weeks, such as an awareness week

Hazards and failure modes required Filled

  • Different week start days causing off-by-one errors
  • Week 53 and year-boundary errors
  • Ambiguous relative expressions

Standards and interfaces required Filled

  • ISO 8601 week dates
  • Working time law defining working weeks

Context of use required Filled

  • Organising work, rest, schedules and reporting in a seven-day cycle.
  • calendar week
  • ISO week
  • working week
  • themed or international weeks
  • intercalary weeks in some calendars

Sources Filled

  1. Wikidata item Q23387: week - identity and sense of the item
  2. Wikipedia: Week - general description of the item

Open questions

  • Should the working week be a separate entry?
  • How should relative week expressions be resolved and recorded?
  • The registry entry has merged aliases naming specific weeks; should they be split off?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q23387/spec.json