← Back to catalogue
Published

Tuesday

vr.tr.tuesday · thing-q127

Let an agent handle Tuesday as a weekday with numbering conventions, working-time rules and named occurrences.

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

Calendar Numbering.

Number

ISO and others.

Numbering

Weekday number.

  1. Which number does Tuesday have in this system? definition
  2. Does the week start on Monday or Sunday here? boundary

Date

Which occurrence.

Occurrence

Specific date.

  1. Which Tuesday is meant? definition
  2. Was the weekday computed correctly? boundary
Work Working patterns.

Status

Working day.

Status

Working status.

  1. Is Tuesday a working day here? boundary
  2. Which sectors differ? boundary

Holidays

Public holidays.

Holidays

Holiday rules.

  1. Do public holidays often fall on Tuesday here? provenance
  2. How are they observed? definition
Named occurrences Special days.

Names

Named days.

Named days

Named occurrences.

  1. Which named Tuesdays fall this year? measurement
  2. What do they mark? definition

Commerce

Sales days.

Commerce

Commercial days.

  1. Are there commercial events on this day, and are offers genuine? boundary
  2. Which consumer rules apply? provenance
Deadlines Scheduling.

Time zones

Across zones.

Zones

Zone handling.

  1. Is it still Tuesday for all participants across zones? boundary
  2. How should the schedule be shown? action

Legal deadlines

Counting.

Deadlines

Deadline rules.

  1. How do legal deadlines treat this day? boundary
  2. Is it a business day? boundary

Classifiers Filled

Family
Thing Registry
Category
Cross-cutting context
Entry kind
thing
Plane
XCT
Domain
XCT.TME
Other names and narrower kinds
Green Monday, Tuesday the 13th, Easter Tuesday, Prinsjesdag, June 9, 1914, 7 January 1800, June 16, 1914, September 17, 1907, December 23, 1902, May 11, 1909, February 2, 1909, first Tuesday of the month

What it is Filled

The day of the week between Monday and Wednesday, day 2 in ISO 8601 weeks; a working day in most countries; some holidays such as Prinsjesdag fall on it.

Why it exists Filled

Let an agent handle Tuesday as a weekday with numbering conventions, working-time rules and named occurrences.

Distinguishing features Filled

  • Day 2 in ISO weeks
  • Usually a working day in many countries
  • Named occurrences carry commercial or religious meaning
  • Specific dates in aliases are instances

What robots and AI may and may not do Filled

Must not

  • Assume Tuesday is a working day everywhere, ignoring local holidays and weekends.
  • Shift a deadline across a time zone so that it falls on the wrong day.
  • Mix up ISO week numbering with local conventions when it changes a legal or financial date.

Only with a human decision

  • Moving a contractual or legal deadline that falls on a Tuesday.

May

  • State whether a given date is a Tuesday in a stated calendar and time zone.
  • Schedule meetings and reminders on Tuesdays as asked.

Moral aspects Filled

  • Calendar errors can make people miss deadlines, wages or obligations.
  • Days carry religious and cultural meaning that differs between communities.

Who is affected

  • People relying on schedules
  • Workers and employers

Owners Filled

Steward

Nobody: a shared convention of the calendar.

Links to other meta-models Filled

parent

  • Q573 - registry parent class
  • Q819073 - registry parent class

related

  • day - weekday
  • week - seven days
  • working time law - rules
  • calendar date - dates

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.tuesday
  • Wikidata: Q127 (https://www.wikidata.org/wiki/Q127)
  • ISO 8601 weekday number: 2 Monday is 1

Direct properties not applicable Not applicable

Not applicable

Plane XCT: no invented physical properties.

Recognition optional Filled

  • Calendar position between Monday and Wednesday
  • ISO 8601 weekday number 2
  • Named occurrences such as Easter Tuesday, Shrove Tuesday and Prinsjesdag
  • Not a thing to see; a day on the calendar.

Capabilities and actions required Filled

  • schedule around it
  • number it as day 2 in ISO 8601
  • apply working-time rules
  • identify named occurrences

Hazards and failure modes required Filled

  • Week-start mismatches
  • Wrong weekday for historical dates

Standards and interfaces required Filled

  • ISO 8601
  • Working time and public holiday law

Context of use required Filled

  • Scheduling, work patterns and observances.
  • ordinary occurrences
  • named occurrences such as Easter Tuesday, Shrove Tuesday and Prinsjesdag

Sources Filled

  1. Wikidata item Q127: Tuesday - identity and sense of the item
  2. Wikipedia: Tuesday - general description of the item

Open questions

  • Should weekdays share one parameterised model?
  • How should named occurrences be linked?
  • The registry entry has merged named days and dates as aliases; 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-q127/spec.json