October 4
Let an agent handle October 4 as a calendar date with day number, weekday computation, observances and sourced events.
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 October 4 as a calendar date with day number, weekday computation, observances and sourced events.
The 277th day of the year in the Gregorian calendar (278th in leap years), with 88 days remaining; observed as World Animal Day and the feast of Saint Francis of Assisi, and the date Sputnik 1 was launched in 1957.
What it is for: A calendar date for scheduling, anniversaries and observances.
It can be compute its weekday in a given year; list observances; find sourced historical events; schedule events.
Distinguishing features
World Animal Day
Feast of Saint Francis in Western Christianity
Launch of Sputnik 1 in 1957
Weekday varies by year
What it looks like
A date on calendars.
Physical character
day of year: 277 or 278 day - common or leap year
days remaining: 88 days
How it is recognised
Written 4 October or October 4
ISO format --10-04
Specific years such as October 4, 1926 are separate
Related models
is part of - month
is a kind of - category
is observed as - observance
is expressed in - notation
In practice
Families and kinds
the recurring calendar date
specific dated days in given years
Identifiers
ISO 8601 --10-04 recurring date
Standards and regulation
ISO 8601
National public holiday laws
Failure modes and hazards
Day-month order confusion
Unsourced on-this-day events
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.
Date Calendar facts.
Calendar arithmetic.
Weekday
Computation.
Weekday
Weekday.
- On which weekday does October 4 fall in this year? measurement
- Is it a leap year? boundary
Format
Notation.
Format
Date format.
- How should the date be written for this audience? action
- Is ISO format needed? boundary
Observances Days of note.
Several observances fall here.
World Animal Day
Observance.
Animals
World Animal Day.
- How is World Animal Day marked, and by which organisations? provenance
- Is it an official holiday anywhere? provenance
Religious
Saint Francis.
Religious
Feast day.
- Which churches observe the feast of Saint Francis on this date? provenance
- How is it marked? definition
History Past events.
Events need sources.
Events
On this day.
Events
Historical events.
- Which notable events happened on this date, according to reliable sources? provenance
- Are dates in the same calendar? boundary
Space
Sputnik 1.
Space
Space history.
- What is the significance of the 1957 Sputnik 1 launch? provenance
- Is World Space Week linked to it? provenance
Planning Scheduling.
Dates drive plans.
Countdown
Days until.
Countdown
Countdown.
- How many days until the next October 4? measurement
- From which date? definition
Anniversaries
Recurring.
Anniversaries
Anniversaries.
- Which anniversaries fall on this date this year? provenance
- Which are round numbers? measurement
What the second pass must settle
- Should dated days be separate entries?
- How should observances be linked?
- How should events be sourced?