Thursday
Let an agent handle Thursday as a weekday with numbering conventions, legal and working-time rules and named occurrences.
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 Thursday as a weekday with numbering conventions, legal and working-time rules and named occurrences.
The day of the week between Wednesday and Friday, day 4 in ISO 8601 weeks; the day on which the ISO week-numbering year is anchored, since week 1 contains the first Thursday.
What it is for: Scheduling, work patterns, trading hours and observances.
It can be schedule around it; number it, as day 4 in ISO 8601; apply working-time and trading rules to it; identify named occurrences.
Distinguishing features
Day 4 in ISO weeks; numbering differs in other conventions
Working day or weekend depending on country
Named occurrences carry commercial or religious meaning
Specific dates in the registry aliases are instances, not the weekday
What it looks like
Not a thing to see; a day on the calendar.
How it is recognised
Calendar position between Wednesday and Friday
ISO 8601 weekday number 4
Named occurrences such as Maundy Thursday and Thanksgiving in the United States
Related models
is a kind of - weekday
is part of - seven days
is regulated by - rules
names - dates fall on weekdays
In practice
Families and kinds
ordinary occurrences
named occurrences such as Maundy Thursday and Thanksgiving in the United States
Identifiers
ISO 8601 weekday number 4 Monday is 1
Standards and regulation
ISO 8601
Public holiday law
Working time law
Failure modes and hazards
Week-start mismatches in software
Assuming the weekend is the same everywhere
Mis-computed day of week for historical dates
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.
Number
ISO and other conventions.
Numbering
Weekday number.
- Which number does Thursday have in this system? definition
- Does the week start on Monday or Sunday here? boundary
Date
Which occurrence.
Occurrence
Specific date.
- Which Thursday is meant, by date? definition
- Was the weekday computed correctly for historical calendars? boundary
Work Working patterns.
Weekend definitions vary by country.
Working status
Working day or weekend.
Status
Working status.
- Is Thursday a working day or part of the weekend here? boundary
- Which sectors differ? boundary
Hours
Opening and trading.
Hours
Opening hours.
- Which trading or opening rules apply on this day? boundary
- Are public services open? definition
Named occurrences Special days.
Some occurrences have names and meaning.
Names
Named days.
Named days
Named occurrences.
- Which named Thursdays fall this year? measurement
- What do they mark? definition
Customs
Observances and superstitions.
Customs
Customs.
- Which customs or observances are tied to this day? definition
- Do they vary by culture? boundary
Deadlines Scheduling and law.
Deadlines and schedules depend on weekdays.
Scheduling
Time zones.
Scheduling
Scheduling across zones.
- Across time zones, is it still Thursday for all participants? boundary
- How should the schedule be shown? action
Legal deadlines
Counting days.
Deadlines
Deadline rules.
- How do legal deadlines treat this day? boundary
- Is it a business day? boundary
What the second pass must settle
- Should weekdays share one model with parameters?
- How should named occurrences be linked?
- The registry entry has merged specific dates as aliases; should they be removed?