{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T04:26:34Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 1,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T15:00:00Z",
      "ingestedAt": "2026-10-05T13:11:18+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:52:01+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q573",
    "registryId": "vr.tr.day",
    "name": "day",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "XCT.TME"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q573/",
  "model": {
    "registry_id": "vr.tr.day",
    "name": "day",
    "purpose": "Let an agent distinguish the day as a unit of time, as a solar period and as a calendar date, and handle time zones and daylight saving correctly.",
    "definition": "A unit of time of 86,400 seconds, and the period of one rotation of the Earth relative to the Sun, reckoned from midnight to midnight in civil use.",
    "what_it_is_for": "Organising time for daily life, work, law and science.",
    "affordances": [
      "count days, for durations and deadlines",
      "name days, with calendar dates and weekdays",
      "divide days, into hours, minutes and seconds",
      "adjust them, as with leap seconds and daylight saving shifts"
    ],
    "distinguishing_features": [
      "A unit of time and a solar cycle, which differ slightly",
      "The civil day follows a time zone and can be 23 or 25 hours on daylight saving changes",
      "Distinct from daytime, the light part of the day",
      "A calendar date names a particular day"
    ],
    "appearance": "Experienced as daylight and night; recorded on clocks and calendars.",
    "visual_identification": [
      "Sunrise and sunset mark daylight, not the civil day",
      "Calendars show days as dates and weekdays",
      "Clocks reset at midnight in civil time"
    ],
    "physical_properties": [
      {
        "quantity": "length",
        "typical_range": "86400",
        "unit": "s",
        "note": "SI day; mean solar day varies by milliseconds"
      },
      {
        "quantity": "sidereal day",
        "typical_range": "86164.09",
        "unit": "s",
        "note": "rotation relative to the stars"
      }
    ],
    "families_and_kinds": [
      "solar day, sidereal day, civil day",
      "working day, business day, calendar day",
      "by name: weekdays"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "unit of time",
        "why": "accepted for use with the SI"
      },
      {
        "relation": "is named by",
        "target": "calendar date",
        "why": "a date identifies one day"
      },
      {
        "relation": "is divided into",
        "target": "hour",
        "why": "24 hours in civil time"
      },
      {
        "relation": "is confused with",
        "target": "daytime",
        "why": "daylight is only part of the day"
      }
    ],
    "identifiers": [
      {
        "scheme": "unit symbol",
        "value_or_pattern": "d",
        "note": "accepted for use with the SI"
      }
    ],
    "standards_and_regulation": [
      "SI Brochure, non-SI units accepted for use",
      "ISO 8601 for date and time representation",
      "National laws on time zones and daylight saving"
    ],
    "failure_modes_and_hazards": [
      "Assuming every day has 24 hours across daylight saving changes",
      "Confusing calendar days with business days in deadlines",
      "Time zone errors that move events to another day"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Count days for durations and deadlines, stating the time zone and calendar.",
        "Name dates and weekdays for its user."
      ],
      "must_not": [
        "Assume every day has 24 hours across daylight saving changes.",
        "Count calendar days where a rule specifies business days, or the reverse.",
        "Shift an event to a different day through a time zone error without flagging it."
      ],
      "requires_human": [
        "Deciding whether a legal or contractual deadline has passed."
      ]
    },
    "ethics": {
      "considerations": [
        "Deadlines measured in days decide rights, payments and appeals.",
        "Rest days and holy days matter to people and communities."
      ],
      "affected_parties": [
        "People with deadlines",
        "Workers and their rest days",
        "Religious communities"
      ]
    },
    "owners": {
      "steward": "Nobody owns it; time authorities and governments set civil time and time zones.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q573: day",
      "url": "https://www.wikidata.org/wiki/Q573",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Day",
      "url": "https://en.wikipedia.org/wiki/Day",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "unit-and-astronomy",
        "name": "Unit and astronomy",
        "description": "The day as unit and as rotation.",
        "rationale": "The unit and the astronomical day differ; precision work needs the distinction.",
        "layers": [
          {
            "id": "unit",
            "name": "Unit",
            "description": "Definition in seconds.",
            "findings": [
              {
                "id": "unit-finding",
                "name": "Unit definition",
                "description": "The unit and its relation to SI.",
                "questions": [
                  {
                    "text": "Which definition of day applies here?",
                    "kind": "definition"
                  },
                  {
                    "text": "Does the precision required make the difference matter?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "astronomy",
            "name": "Astronomical day",
            "description": "Solar and sidereal days.",
            "findings": [
              {
                "id": "astronomy-finding",
                "name": "Astronomical basis",
                "description": "The astronomical day used.",
                "questions": [
                  {
                    "text": "Is the solar or the sidereal day meant?",
                    "kind": "definition"
                  },
                  {
                    "text": "How does day length vary over the year?",
                    "kind": "measurement"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "civil-day",
        "name": "Civil day",
        "description": "Days in time zones.",
        "rationale": "The civil day is political: governments set time zones and daylight saving.",
        "layers": [
          {
            "id": "zone",
            "name": "Time zone",
            "description": "The zone the day belongs to.",
            "findings": [
              {
                "id": "zone-finding",
                "name": "Zone rules",
                "description": "The zone and its offset rules.",
                "questions": [
                  {
                    "text": "In which time zone is this day reckoned?",
                    "kind": "definition"
                  },
                  {
                    "text": "Does a daylight saving change fall on it?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "boundaries",
            "name": "Day boundaries",
            "description": "Midnight and edge cases.",
            "findings": [
              {
                "id": "boundaries-finding",
                "name": "Boundary rules",
                "description": "When the day begins and ends.",
                "questions": [
                  {
                    "text": "When does this day begin and end?",
                    "kind": "definition"
                  },
                  {
                    "text": "How are events near midnight assigned?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "counting",
        "name": "Counting days",
        "description": "Durations and deadlines.",
        "rationale": "Counting days in law and business follows rules that differ from simple arithmetic.",
        "layers": [
          {
            "id": "durations",
            "name": "Durations",
            "description": "Calendar and business days.",
            "findings": [
              {
                "id": "durations-finding",
                "name": "Counting rule",
                "description": "Which days are counted.",
                "questions": [
                  {
                    "text": "Are calendar days or business days counted?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which holidays are excluded, and in which jurisdiction?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "deadlines",
            "name": "Deadlines",
            "description": "Day-based deadlines.",
            "findings": [
              {
                "id": "deadlines-finding",
                "name": "Deadline rule",
                "description": "How a day-count deadline is computed.",
                "questions": [
                  {
                    "text": "How is this deadline computed in days?",
                    "kind": "definition"
                  },
                  {
                    "text": "What happens when it falls on a non-working day?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "naming",
        "name": "Naming",
        "description": "Weekdays and dates.",
        "rationale": "Days are named in several ways at once.",
        "layers": [
          {
            "id": "weekday",
            "name": "Weekday",
            "description": "The day of the week.",
            "findings": [
              {
                "id": "weekday-finding",
                "name": "Weekday naming",
                "description": "The weekday and numbering convention.",
                "questions": [
                  {
                    "text": "Which weekday is this, and which numbering convention applies?",
                    "kind": "definition"
                  },
                  {
                    "text": "Does the week start on Monday or Sunday here?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "date",
            "name": "Date",
            "description": "The calendar date.",
            "findings": [
              {
                "id": "date-finding",
                "name": "Date identifier",
                "description": "The date naming this day.",
                "questions": [
                  {
                    "text": "Which calendar date names this day?",
                    "kind": "definition"
                  },
                  {
                    "text": "In which calendar?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should the civil day and the solar day be separate entries?",
    "How should business days be modelled across jurisdictions with different holidays?",
    "How should agents present day counts that cross time zones?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}