March 30
Let an agent handle March 30 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 March 30 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 March 30 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 March 30, 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 March 30? 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
March 30, day 89 (day 90 in leap years) of the year in the Gregorian calendar, with 276 days remaining in both common and leap years. Observances on this date vary by country and tradition.
Why it exists Filled
Let an agent handle March 30 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.
Distinguishing features Filled
- The thirtieth day of March
- 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
- Confuse March 30 with March 29 or other neighbouring dates when citing events.
- Present one country's observance as global.
- Invent anniversaries for the date.
Only with a human decision
- Setting legal or contractual deadlines on the date for someone.
May
- State the date's position in the Gregorian year and convert it to other calendars.
- Report observances and historical events on March 30 with sources.
Moral aspects Filled
- Dates in records settle rights and deadlines.
- Anniversaries can carry grief for families.
Who is affected
- People with deadlines on the date
- Families marking anniversaries
- Historians
Owners Filled
Steward
The public: held in common; nobody owns a calendar date.
Links to other meta-models Filled
parent
- Q11187571 - registry parent class
related
- March - month
- March 29 - 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.march-30
- Wikidata: Q2460 (https://www.wikidata.org/wiki/Q2460)
- ISO 8601: --03-30 recurring date
Direct properties not applicable Not applicable
- day of year: 89 or 90 day - common year, leap year where different
- days remaining: 276 days
Plane XCT: no invented physical properties.
Recognition optional Filled
- Written 30 March or March 30
- ISO format --03-30
- 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 Q2460: March 30 - identity and sense of the item
- Wikipedia: March 30 - 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-q2460/spec.json