January 5
Let an agent handle January 5 as a calendar date with 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 January 5 as a calendar date with weekday computation, observances and sourced events.
January 5, the fifth day of the year in the Gregorian calendar, with 360 days remaining (361 in leap years).
What it is for: A calendar date for scheduling, holidays and anniversaries.
It can be compute its weekday in a given year; check local observances; find sourced historical events; schedule events.
Distinguishing features
Early January date
Often in the New Year holiday period
Weekday varies by year
Some churches using the Julian calendar observe feasts on shifted dates
What it looks like
A date on calendars.
Physical character
day of year: 5 day
days remaining: 360 or 361 days - common or leap year
How it is recognised
Written 5 January or January 5
ISO format --01-05
Observances vary by country and church calendar
Related models
is part of - month
follows - date
is a kind of - category
is expressed in - notation
In practice
Families and kinds
the recurring calendar date
specific dated days in given years
Identifiers
ISO 8601 --01-05 recurring date
Standards and regulation
ISO 8601
National public holiday laws
Failure modes and hazards
Assuming observances are universal
Unsourced on-this-day events
Mixing Julian and Gregorian dates
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 January 5 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 the Julian or Gregorian calendar meant? boundary
Observances Holidays.
Observances vary.
Holiday
Public holiday.
Holiday
Holiday status.
- Is January 5 a public holiday or observance here? provenance
- Which calendar or tradition sets it? provenance
Closures
Services.
Closures
Closures.
- Which services are closed or reduced? provenance
- Where can emergency help be found? action
History Past events.
Events need sources.
Events
On this day.
Events
Historical events.
- Which notable events happened on January 5, according to reliable sources? provenance
- Are dates given in the same calendar? boundary
Anniversaries
Recurring.
Anniversaries
Anniversaries.
- Which anniversaries fall on this date this year? provenance
- Which are round numbers? measurement
Planning Scheduling.
Dates drive plans.
Countdown
Days until.
Countdown
Countdown.
- How many days until the next January 5? measurement
- From which date? definition
Work
Working day.
Work
Working day.
- Is it a working day for this organisation? provenance
- Do deadlines move? boundary
What the second pass must settle
- Should dated days be separate entries?
- How should regional observances be linked?
- How should events be sourced?