March
Let an agent explain March as a calendar month, relay length, position, astronomy, etymology and common observances from calendar and cultural sources, and distinguish March from the March equinox, the verb and noun march, and months in other calendars, noting that observances vary by country and year.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What March is.
Definition
Definition.
Definition
Definition.
- What is March, and how does it relate to the March equinox, the word march and months in other calendars? definition
- Is the question about dates, seasons, holidays or etymology? boundary
Days
Days of March.
Days
Days.
- Which days of March have entries, and what day-of-year numbers do they have? measurement
- Which entry fits the specific day? action
Astronomy Astronomy and seasons.
Equinox
Equinox.
Equinox
Equinox.
- Why does the March equinox fall around 20 March? provenance
- Which references are standard? provenance
Clock changes
Daylight saving.
Clock changes
Clock changes.
- When do clocks change in March in Europe and North America? provenance
- Which sources are cited? provenance
Culture Observances.
Observances
Observances.
Observances
Observances.
- Which observances fall in March, such as International Women s Day, St Patrick s Day and Nowruz? provenance
- Which entry fits Nowruz? action
Ides
Ides of March.
Ides
Ides.
- What were the Ides of March and why are they remembered? provenance
- Which entry fits Ides of March? action
Context Calendar history.
Roman
Roman calendar.
Roman
Roman.
- Why was March once the first month of the Roman year? provenance
- Which entry fits Roman calendar? action
New year
Legal new year.
New year
New year.
- Why did England start the legal year on 25 March until 1752? provenance
- Which entry fits Lady Day? action
Classifiers Filled
- Family
- Thing Registry
- Category
- Information and virtual systems
- Entry kind
- thing
- Plane
- INF
- Domain
- INF.KNW
What it is Filled
The third month of the year in the Julian and Gregorian calendars, with 31 days, running from day 60 to day 90 in common years and from day 61 to day 91 in leap years, named after the Roman god Mars and originally the first month of the early Roman calendar; the March equinox occurs around 20 March in the Gregorian calendar, with a different date in the Julian calendar, and marks the start of astronomical spring in the Northern Hemisphere and autumn in the Southern Hemisphere; observances include International Women's Day on 8 March, St Patrick's Day on 17 March and Nowruz at the equinox, and the Ides of March on 15 March recall the assassination of Julius Caesar in 44 BC.
Why it exists Filled
Let an agent explain March as a calendar month, relay length, position, astronomy, etymology and common observances from calendar and cultural sources, and distinguish March from the March equinox, the verb and noun march, and months in other calendars, noting that observances vary by country and year.
Distinguishing features Filled
- Third month
- Contains an equinox
- Named after Mars
- Former start of the Roman year
What robots and AI may and may not do Filled
Must not
- Assume March means spring for everyone.
- Present daylight saving changes in March as happening on the same date everywhere.
- Give moveable observances in March, such as Easter or Ramadan dates, as fixed.
- Treat March as the first month of the year without saying which calendar is meant.
Only with a human decision
- Setting deadlines in March that depend on a moveable date or a clock change.
May
- State that March has 31 days, from day 60 to day 90 in common years.
- Say whether March is spring or autumn for the hemisphere being discussed.
Moral aspects Filled
- Northern Hemisphere assumptions erase the seasons of people in the south.
- Clock changes and moveable feasts cause real scheduling failures across regions.
Who is affected
- People in the Southern Hemisphere
- Communities with March observances
- Planners and schedulers
Owners Filled
Steward
Nobody owns the month; it belongs to the calendar in common use.
Links to other meta-models Filled
parent
- Q18602249 - registry parent class
related
- month of the Gregorian calendar - in registry terms
- February
- April
contains
- March equinox
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.march
- Wikidata: Q110 (https://www.wikidata.org/wiki/Q110)
Direct properties not applicable Not applicable
- days: 31 count
- day of year range: 60-90 in common years, 61-91 in leap years note
- equinox: around 20 March date - varies by year and time zone
- ISO 8601 number: 03 code
Plane INF: no invented physical properties.
Recognition optional Filled
- Third month of the Gregorian calendar
- March, Mar
- The March equinox is an astronomical event; march also means a walk or procession; other calendars differ
- Not a visible object; a calendar period.
Capabilities and actions required Filled
- explain position and length
- relay astronomy and etymology
- describe observances
- distinguish related concepts
Hazards and failure modes required Filled
- Assuming Northern Hemisphere seasons
- Stating moveable observances as fixed
- Confusing daylight saving start dates by region
Standards and interfaces required Filled
- ISO 8601 date representation
- National public holiday laws
- Daylight saving time rules
Context of use required Filled
- Organising time within the year.
- days of March
- March observances
- March in different hemispheres
Sources Filled
- Wikidata item Q110: March - identity and sense of the item
- Wikipedia: March - general description of the item
Open questions
- Should observances be linked individually?
- How should calendar sources be linked?
- How should moveable observances such as Easter be recorded?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q110/spec.json