{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.december","code":"thing-q126","url":"https://ver.cy/models/thing/q126/","name":"December","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.4","language":"en","classifiers":{"family":"Thing Registry","category":"Information and virtual systems","entryKind":"thing","plane":"INF","domain":["INF.KNW"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The twelfth and last month of the year in the Julian and Gregorian calendars, with 31 days, running from day 335 to day 365 in common years and from day 336 to day 366 in leap years, named from Latin decem, ten, because it was the tenth month of the early Roman calendar, containing the December solstice around 21 or 22 December in the Gregorian calendar, with a different date in the contemporary Julian calendar, marking the start of astronomical winter in the Northern Hemisphere and summer in the Southern Hemisphere, and including observances such as Human Rights Day on 10 December, Christmas on 25 December, New Year's Eve on 31 December and in many years Hanukkah, whose dates follow the Hebrew calendar.","purpose":"Let an agent explain December as a calendar month, relay length, position, astronomy, etymology and common observances from calendar and cultural sources, and distinguish December from the December solstice, the holiday season as a cultural period and months in other calendars, noting that observances vary by country and year.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Last month","Contains a solstice","Name from tenth Roman month","Major holidays"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What December is.","layers":[{"id":"definition","name":"Definition","description":"Definition.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is December, and how does it relate to the December solstice, the holiday season and months in other calendars?","kind":"definition"},{"text":"Is the question about dates, seasons, holidays or etymology?","kind":"boundary"}]}]},{"id":"days","name":"Days","description":"Days of December.","findings":[{"id":"days-finding","name":"Days","description":"Days.","questions":[{"text":"Which days of December have entries, and what day-of-year numbers do they have?","kind":"measurement"},{"text":"Which entry fits the specific day?","kind":"action"}]}]}]},{"id":"astronomy","name":"Astronomy","description":"Astronomy and seasons.","layers":[{"id":"solstice","name":"Solstice","description":"Solstice.","findings":[{"id":"solstice-finding","name":"Solstice","description":"Solstice.","questions":[{"text":"Why does the December solstice fall around 21 or 22 December?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"seasons","name":"Seasons","description":"Seasons.","findings":[{"id":"seasons-finding","name":"Seasons","description":"Seasons.","questions":[{"text":"How does December differ between hemispheres?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"culture","name":"Culture","description":"Observances.","layers":[{"id":"holidays","name":"Holidays","description":"Holidays.","findings":[{"id":"holidays-finding","name":"Holidays","description":"Holidays.","questions":[{"text":"Which holidays fall in December, including Christmas, Hanukkah in many years and New Year s Eve?","kind":"provenance"},{"text":"Which entry fits Christmas?","kind":"action"}]}]},{"id":"rights","name":"Human rights","description":"Human Rights Day.","findings":[{"id":"rights-finding","name":"Human rights","description":"Human rights.","questions":[{"text":"What does Human Rights Day on 10 December commemorate?","kind":"provenance"},{"text":"Which entry fits Universal Declaration of Human Rights?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"Calendar history.","layers":[{"id":"roman","name":"Roman","description":"Roman calendar.","findings":[{"id":"roman-finding","name":"Roman","description":"Roman.","questions":[{"text":"Why is December named for ten, and what was Saturnalia?","kind":"provenance"},{"text":"Which entry fits Saturnalia?","kind":"action"}]}]},{"id":"yearend","name":"Year end","description":"Year end.","findings":[{"id":"yearend-finding","name":"Year end","description":"Year end.","questions":[{"text":"How do cultures mark the end of the calendar year?","kind":"provenance"},{"text":"Which entry fits New Year s Eve?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Compute dates, durations and day numbers in December for the Gregorian or Julian calendar.","List December holidays with their tradition and note when lunar or lunisolar dates shift."],"mustNot":["Assume December is winter everywhere.","State lunisolar holidays such as Hanukkah as falling on fixed Gregorian dates.","Assume that everyone celebrates Christmas or present it as universal.","Ignore Julian-calendar churches that celebrate Christmas on another date."],"requiresHuman":["Setting end-of-year deadlines that affect people of several faiths and countries."]},"ethics":{"considerations":["Assuming one religious calendar excludes people who observe other traditions."],"affectedParties":["People of different faiths","Workers on holiday shifts"]},"owners":{"steward":"Nobody owns it; it is part of the civil calendar.","roles":[],"masterSystems":[]},"relations":[{"target":"Q18602249","type":"parent","note":"registry parent class"},{"target":"month of the Gregorian calendar","type":"related","note":"in registry terms"},{"target":"November","type":"related"},{"target":"January","type":"related","note":"of the next year"},{"target":"December solstice","type":"contains"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.december","Wikidata: Q126 (https://www.wikidata.org/wiki/Q126)"]},"properties":{"applicability":"not-applicable","items":["days: 31 count","day of year range: 335-365 in common years, 336-366 in leap years note","solstice: around 21 or 22 December date - varies by year and time zone","ISO 8601 number: 12 code"]},"recognition":{"applicability":"optional","items":["Twelfth month of the Gregorian calendar","December, Dec","The December solstice is an astronomical event; the holiday season spans several weeks; other calendars differ","Not a visible object; a calendar period."]},"capabilities":{"applicability":"required","items":["explain position and length","relay astronomy and etymology","describe observances","distinguish related concepts"]},"hazards":{"applicability":"required","items":["Assuming winter everywhere","Stating lunisolar holidays such as Hanukkah as fixed","Assuming everyone celebrates Christmas"]},"interfaces":{"applicability":"required","items":["ISO 8601 date representation","National public holiday laws"]},"context":{"applicability":"required","items":["Organising time within the year.","days of December","December observances","December in different hemispheres"]}},"sources":[{"title":"Wikidata item Q126: December","url":"https://www.wikidata.org/wiki/Q126","note":"identity and sense of the item"},{"title":"Wikipedia: December","url":"https://en.wikipedia.org/wiki/December","note":"general description of the item"}],"openQuestions":["Should observances be linked individually?","How should calendar sources be linked?","How should moveable holidays be recorded?"],"resources":{"spec":"/models/things/publications/thing-q126/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q126/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T21:50:34Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:25+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane INF: no invented physical properties."},"score":1.0}}