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.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
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.
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.
What it is for: Dating Islamic months and observances.
It can be explain the calendar; relay its structure and months; describe computed forms; distinguish it from solar calendars.
Distinguishing features
Lunar
Twelve months
Shorter than the solar year
Dates observances
What it looks like
Not a visible object; a system of lunar months used for dating.
Physical character
type: lunar calendar note
year: about 354 days note
registry parent: twelve-month calendar note
How it is recognised
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
Related models
is a kind of - in registry terms
is contrasted with -
is contrasted with -
dates -
In practice
Families and kinds
observational Islamic calendar
Umm al-Qura calendar
tabular Islamic calendar
Standards and regulation
Calendrical and religious conventions
Failure modes and hazards
Fixing Islamic dates to solar dates
Confusing computed and observational forms
Non-respectful treatment
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What the calendar is.
Attribution.
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.
Sources.
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.
Attribution.
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.
Attribution.
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
What the second pass must settle
- Should computed forms be separate entries?
- How should conversions be verified?
- How should months be linked?