May 31
Let an agent handle May 31 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 May 31 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 May 31 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 May 31, 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 May 31? 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
May 31, day 151 (day 152 in leap years) of the year in the Gregorian calendar, with 214 days remaining in both common and leap years. May 31 is World No Tobacco Day and the last day of May.
Why it exists Filled
Let an agent handle May 31 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.
Distinguishing features Filled
- The thirty-first day of May
- 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
- Attach tobacco or vaping marketing to the awareness day.
- Present quitting advice as medical treatment in place of a clinician.
- Schedule month-end runs on this date without handling shorter months.
Only with a human decision
- Publishing health campaign content for an organization.
May
- Report that May 31 is World No Tobacco Day and the last day of May.
- Use the date in calendars and day-count calculations.
Moral aspects Filled
- Tobacco remains a leading cause of preventable death, and honest messaging saves lives.
- Awareness days are trusted channels that marketers try to capture.
Who is affected
- Smokers and people trying to quit
- Young people targeted by marketing
Owners Filled
Steward
Nobody owns a date; the observance belongs to the health body that declared it.
Links to other meta-models Filled
parent
- Q11187583 - registry parent class
related
- May - month
- May 30 - 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.may-31
- Wikidata: Q2591 (https://www.wikidata.org/wiki/Q2591)
- ISO 8601: --05-31 recurring date
Direct properties not applicable Not applicable
- day of year: 151 or 152 day - common year, leap year where different
- days remaining: 214 days
Plane XCT: no invented physical properties.
Recognition optional Filled
- Written 31 May or May 31
- ISO format --05-31
- 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 Q2591: May 31 - identity and sense of the item
- Wikipedia: May 31 - 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-q2591/spec.json