Sunday
Let an agent handle Sunday as a weekday with numbering conventions, legal rules on trading and work, and religious significance.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle Sunday as a weekday with numbering conventions, legal rules on trading and work, and religious significance.
The day of the week between Saturday and Monday, the first day of the week in some calendars and the last in ISO 8601; a day of rest and worship in many Christian traditions.
What it is for: Rest, worship, family and leisure in many societies.
It can be schedule around it; observe it religiously; regulate trading and work on it; number it, as day 7 in ISO 8601.
Distinguishing features
Day 7 in ISO weeks, day 1 in some other conventions
Rest day in many countries, with trading laws
Christian day of worship
Named Sundays mark feasts and commemorations
What it looks like
Not a thing to see; a day on the calendar.
How it is recognised
Calendar position after Saturday
ISO 8601 day number 7
Named Sundays such as Easter Sunday or Remembrance Sunday
Related models
is a kind of - weekday
is part of - seven days
is observed as - in many places
is regulated by - shop hours
In practice
Families and kinds
ordinary Sundays
named Sundays such as Easter Sunday, Palm Sunday, Remembrance Sunday
Identifiers
ISO 8601 weekday number 7 Monday is 1
Standards and regulation
ISO 8601
Sunday trading laws
Working time law on rest days
Failure modes and hazards
Week-start mismatch in software
Assuming shops are open or closed without checking local law
Deadlines falling on Sundays
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Calendar Position and numbering.
Numbering differs between systems.
Position
First or last day.
Position
Position in the week.
- Is Sunday the first or last day of the week in this context? definition
- Which convention does the software use? boundary
Date
Which Sunday.
Date
The specific Sunday.
- Which calendar date is meant? definition
- Is it a named Sunday? definition
Rules Trading and work.
Sunday rules vary widely.
Trading
Shop hours.
Trading rules
Rules on trading.
- Are shops allowed to open on Sunday here, and for how long? boundary
- Which exemptions apply? boundary
Work
Rest-day rules.
Work rules
Rules on Sunday work.
- What rights do workers have about Sunday work? boundary
- Is extra pay required? boundary
Religion and culture Observance.
Sunday has religious meaning for many.
Worship
Services.
Observance
Religious observance.
- How is Sunday observed in this tradition? definition
- Which named Sundays fall this year? measurement
Customs
Social customs.
Customs
Customs and leisure.
- What customs are associated with Sunday here? definition
- How are they changing? measurement
Deadlines Sunday and time limits.
Legal deadlines often move when they fall on Sundays.
Rule
Deadline extension.
Deadline rule
How deadlines are treated.
- Does a deadline falling on Sunday move to Monday here? boundary
- Under which rule? provenance
Services
What is open.
Services
Services available.
- Which public services operate on Sunday? definition
- Where can urgent help be found? action
What the second pass must settle
- Should weekdays be separate entries?
- How should named Sundays be linked?
- The registry entry has merged aliases with specific dates; should they be split off?