Islamic calendar
Let an agent explain the Islamic calendar, relay its structure, months and use from reference sources respectfully with conversions checked, describe the computed forms its aliases name, and distinguish it from the solar Gregorian calendar.
Bundle → Layer → Finding → Questions Filled
4 bundles · 8 layers · 8 findings · 16 questions
Understand What the calendar is.
Definition
Definition.
Definition
Definition.
- What is the Islamic calendar, and how does it differ from the Gregorian calendar? definition
- Is the question about a date conversion that needs checking? boundary
Forms
Computed forms.
Forms
Forms.
- What are the Umm al-Qura and tabular Islamic calendars? definition
- Which entry fits the specific form? action
Structure Structure.
Months
Months.
Months
Months.
- What are the twelve months of the Islamic calendar? provenance
- Which entry fits the specific month? action
Lunar
Lunar year.
Lunar
Lunar.
- Why is the lunar year shorter than the solar year? provenance
- Which references are standard? provenance
Use Use.
Observances
Observances.
Observances
Observances.
- How does the calendar date Ramadan, the Hajj and the Eids? provenance
- Is the presentation respectful? boundary
Sighting
Moon sighting.
Sighting
Sighting.
- How do moon sighting and computation set the months? provenance
- Are conversions checked against current sources? boundary
Context Context.
Conversion
Conversion.
Conversion
Conversion.
- How are Islamic and Gregorian dates converted? provenance
- Is the information current? boundary
Regions
Regional use.
Regions
Regions.
- How does calendar use vary between countries and communities? provenance
- Is the presentation respectful? boundary
Classifiers Filled
- Family
- Thing Registry
- Category
- Information and virtual systems
- Entry kind
- thing
- Plane
- INF
- Domain
- INF.KNW
- Other names and narrower kinds
- Umm Al-Qura calendar, Tabular Islamic calendar
What it is Filled
The Islamic calendar is a lunar calendar of twelve months in a year of about 354 days, used to date religious observances in Islam such as Ramadan, the Hajj and the two Eids; the registry aliases name computed forms such as the Umm al-Qura and tabular Islamic calendars. Because it is shorter than the solar year, its dates shift earlier each year against the common calendar, so conversions should be checked against current sources. The calendar is treated respectfully.
Why it exists Filled
Let an agent explain the Islamic calendar, relay its structure, months and use from reference sources respectfully with conversions checked, describe the computed forms its aliases name, and distinguish it from the solar Gregorian calendar.
Distinguishing features Filled
- Lunar
- Twelve months
- Shorter than the solar year
- Dates observances
What robots and AI may and may not do Filled
Must not
- Fix Islamic dates to set solar dates or present calculated dates as confirmed.
- Treat one authority's calendar as binding on every Muslim community.
- Treat the calendar or its observances disrespectfully.
- Schedule exams or obligations without regard to major observances where accommodation is due.
Only with a human decision
- Announcing the start of Ramadan or Eid to a community.
May
- Convert dates between the Islamic and common calendars, stating whether a computed or sighting-based form is used.
- Explain the lunar year and why observances move through the seasons.
Moral aspects Filled
- Correct dates matter for fasting, pilgrimage and festivals.
- Disregarding the calendar in workplaces and schools can exclude Muslims.
Who is affected
- Muslims
- Pilgrims and travellers
- Religious authorities
Owners Filled
Steward
Religious authorities who determine and announce dates for their communities.
Links to other meta-models Filled
parent
- Q17154131 - registry parent class
related
- calendar - in registry terms
- Gregorian calendar
- solar calendar
- Islamic observances
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.islamic-calendar
- Wikidata: Q28892 (https://www.wikidata.org/wiki/Q28892)
Direct properties not applicable Not applicable
- type: lunar calendar note
- year: about 354 days note
- registry parent: twelve-month calendar note
Plane INF: no invented physical properties.
Recognition optional Filled
- Lunar calendar of twelve Islamic months
- Umm al-Qura and tabular Islamic calendars
- The Gregorian calendar is solar, so the two drift apart over the years
- Not a visible object; a system of lunar months used for dating.
Capabilities and actions required Filled
- explain the calendar
- relay its structure and months
- describe computed forms
- distinguish it from solar calendars
Hazards and failure modes required Filled
- Fixing Islamic dates to solar dates
- Confusing computed and observational forms
- Non-respectful treatment
Standards and interfaces required Filled
- Calendrical and religious conventions
Context of use required Filled
- Dating Islamic months and observances.
- observational Islamic calendar
- Umm al-Qura calendar
- tabular Islamic calendar
Sources Filled
- Wikidata item Q28892: Islamic calendar - identity and sense of the item
- Wikipedia: Islamic calendar - general description of the item
Open questions
- Should computed forms be separate entries?
- How should conversions be verified?
- How should months be linked?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q28892/spec.json