September 27
Let an agent handle September 27 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 September 27 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 September 27 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 September 27, 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 September 27? 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
September 27, day 270 (day 271 in leap years) of the year in the Gregorian calendar, with 95 days remaining in both common and leap years. September 27 is World Tourism Day, established by the UN World Tourism Organization, and the anniversary of the approval of the Society of Jesus by Pope Paul III in 1540, the opening of the Stockton and Darlington Railway in 1825 and the date of Champollion s letter announcing the decipherment of Egyptian hieroglyphs in 1822.
Why it exists Filled
Let an agent handle September 27 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.
Distinguishing features Filled
- The twenty-seventh day of September
- 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 World Tourism Day as a public holiday or day off.
- Use the date's observances to promote a travel product as if officially endorsed.
- List on-this-day events without sources or mixed with legends.
- Shift a date such as the 1540 approval of the Society of Jesus between Julian and Gregorian reckoning without saying so.
Only with a human decision
- Announcing an organisation's participation in a World Tourism Day campaign.
May
- Compute the weekday of September 27 in a given year.
- Relay that September 27 is World Tourism Day, attributing it to the UN tourism agency.
- Relay other events on this date, such as the 1825 opening of the Stockton and Darlington Railway, with sources.
Moral aspects Filled
- Tourism celebrations can hide the strain that mass tourism puts on local residents.
- Religious anniversaries on this date matter to the communities that hold them.
Who is affected
- Tourism workers and host communities
- Religious communities
- Readers of date facts
Owners Filled
Steward
Nobody owns a calendar date; the UN tourism agency coordinates World Tourism Day.
Links to other meta-models Filled
parent
- Q11187356 - registry parent class
related
- September - month
- September 26 - 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.september-27
- Wikidata: Q2884 (https://www.wikidata.org/wiki/Q2884)
- ISO 8601: --09-27 recurring date
Direct properties not applicable Not applicable
- day of year: 270 or 271 day - common year, leap year where different
- days remaining: 95 days
Plane XCT: no invented physical properties.
Recognition optional Filled
- Written 27 September or September 27
- ISO format --09-27
- 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 Q2884: September 27 - identity and sense of the item
- Wikipedia: September 27 - 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-q2884/spec.json