June 18
Let an agent handle June 18 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 June 18 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 June 18 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 June 18, 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 June 18? 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
June 18, day 169 (day 170 in leap years) of the year in the Gregorian calendar, with 196 days remaining in both common and leap years. June 18 falls a few days before the June solstice and is observed in some countries as a national or memorial day.
Why it exists Filled
Let an agent handle June 18 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.
Distinguishing features Filled
- The eighteenth day of June
- 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
- Treat a national or memorial day held by one country as universal.
- Confuse Gregorian June 18 with the same label in Julian or other calendars.
- Schedule deadlines on June 18 without checking local public holidays that fall on it.
Only with a human decision
- Choosing June 18 as a binding date in a contract or legal filing.
May
- Convert June 18 between calendars and give its day number in common and leap years.
- List observances on June 18 with the country or community that holds each.
Moral aspects Filled
- Memorial days on this date carry grief and national memory for some communities.
- Getting a date wrong can void an obligation or miss a legal deadline.
Who is affected
- Communities that observe it
- People bound by deadlines on it
Owners Filled
Steward
Nobody: a calendar date is held in common; states define their own observances on it.
Links to other meta-models Filled
parent
- Q11185474 - registry parent class
related
- June - month
- June 17 - 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.june-18
- Wikidata: Q2670 (https://www.wikidata.org/wiki/Q2670)
- ISO 8601: --06-18 recurring date
Direct properties not applicable Not applicable
- day of year: 169 or 170 day - common year, leap year where different
- days remaining: 196 days
Plane XCT: no invented physical properties.
Recognition optional Filled
- Written 18 June or June 18
- ISO format --06-18
- 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 Q2670: June 18 - identity and sense of the item
- Wikipedia: June 18 - 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-q2670/spec.json