October 19
Let an agent handle October 19 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Date Calendar facts.
Weekday
Computation.
Weekday
Weekday.
- On which weekday does October 19 fall in this year? measurement
- Is it a leap year? boundary
Calendar
Julian or Gregorian.
Calendar
Calendar system.
- Is the Julian or Gregorian calendar meant? boundary
- What is the equivalent date in the other calendar? measurement
Observances Holidays.
Holiday
Public holiday.
Holiday
Holiday status.
- Is October 19 a public holiday or observance here? provenance
- Which tradition or law sets it? provenance
Attribution
Traditions.
Attribution
Attributed observances.
- Which countries or communities observe something on this date, according to them? provenance
- Is the observance attributed rather than assumed? boundary
History Past events.
Events
On this day.
Events
Historical events.
- Which notable events happened on October 19, 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.
Countdown
Days until.
Countdown
Countdown.
- How many days until the next October 19? measurement
- From which date? definition
Work
Working day.
Work
Working day.
- Is it a working day for this organisation? provenance
- Do deadlines move? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Cross-cutting context
- Entry kind
- thing
- Plane
- XCT
- Domain
- XCT.TME
What it is Filled
October 19, day 292 (day 293 in leap years) of the year in the Gregorian calendar, with 73 days remaining in both common and leap years. October 19 is Constitution Day in Niue and the anniversary of the British surrender at Yorktown in 1781, of the Black Monday stock market crash of 1987 and of the beatification of Mother Teresa in 2003.
Why it exists Filled
Let an agent handle October 19 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.
Distinguishing features Filled
- The nineteenth day of October
- Weekday varies by year
- Observances vary by place
- Julian and Gregorian dates differ by 13 days in this era
What robots and AI may and may not do Filled
Must not
- Present Niue's observance as universal.
- Overlook small states when listing observances on the date.
- List on-this-day events without sources or mix calendar systems.
Only with a human decision
- Fixing contractual deadlines on this date across time zones.
May
- Give October 19 as day 292 of the Gregorian year, 293 in leap years.
- Note Constitution Day in Niue, with source.
Moral aspects Filled
- Small nations' observances deserve the same accuracy as large ones.
- Unsourced anniversaries spread false history.
Who is affected
- People of Niue
- Readers
- Communities marking the date
Owners Filled
Steward
Nobody owns the date; the public holds it in common.
Links to other meta-models Filled
parent
- Q11186284 - registry parent class
related
- October - month
- October 18 - date
- calendar date - category
- ISO 8601 - notation
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.october-19
- Wikidata: Q2961 (https://www.wikidata.org/wiki/Q2961)
- ISO 8601: --10-19 recurring date
Direct properties not applicable Not applicable
- day of year: 292 or 293 day - common year, leap year where different
- days remaining: 73 days
Plane XCT: no invented physical properties.
Recognition optional Filled
- Written 19 October or October 19
- ISO format --10-19
- Observances vary by country and tradition
- A date on calendars.
Capabilities and actions required Filled
- compute its weekday in a given year
- check local and international observances
- find sourced historical events
- schedule events
Hazards and failure modes required Filled
- Assuming observances are universal
- Unsourced on-this-day events
- Mixing Julian and Gregorian dates
Standards and interfaces required Filled
- ISO 8601
- National public holiday laws
Context of use required Filled
- A calendar date for scheduling, holidays and anniversaries.
- the recurring calendar date
- specific dated days in given years
Sources Filled
- Wikidata item Q2961: October 19 - identity and sense of the item
- Wikipedia: October 19 - general description of the item
Open questions
- Should dated days be separate entries?
- How should observances be linked?
- How should events be sourced?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q2961/spec.json