{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.february","code":"thing-q109","url":"https://ver.cy/models/thing/q109/","name":"February","alternateNames":["Veguary"],"kind":"thing","status":"published","version":"0.2.0-wave.3","language":"en","classifiers":{"family":"Thing Registry","category":"Information and virtual systems","entryKind":"thing","plane":"INF","domain":["INF.KNW"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The second month of the year in the Julian and Gregorian calendars and the shortest, with 28 days in common years and 29 in leap years, following January and preceding March, falling in winter in the northern hemisphere and summer in the southern, named from the Roman purification festival Februa, and containing observances such as Valentine Day on 14 February, Black History Month in the United States and Canada, and Lunar New Year in many years.","purpose":"Let an agent describe February as a calendar month, relay its length in common and leap years, position, seasons and notable observances, explain its name and the leap day, and route date-specific questions to entries for individual days.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Shortest month","Leap day on 29 February","Winter month in the north","Purification festival origin"],"structure":{"bundles":[{"id":"calendar","name":"Calendar","description":"February in the calendar.","layers":[{"id":"position","name":"Position","description":"Position and length.","findings":[{"id":"position-finding","name":"Position","description":"Position.","questions":[{"text":"Where does February fall, and how many days does it have in a given year?","kind":"definition"},{"text":"Is the question about the Gregorian February or another calendar?","kind":"boundary"}]}]},{"id":"leap","name":"Leap","description":"Leap years.","findings":[{"id":"leap-finding","name":"Leap","description":"Leap.","questions":[{"text":"How do the Gregorian leap year rules decide whether February has 29 days?","kind":"definition"},{"text":"Which entry fits leap year?","kind":"action"}]}]}]},{"id":"observances","name":"Observances","description":"Observances.","layers":[{"id":"international","name":"International","description":"International and cultural days.","findings":[{"id":"international-finding","name":"International","description":"International.","questions":[{"text":"What observances fall in February, such as Valentine Day, World Cancer Day and Black History Month?","kind":"provenance"},{"text":"Which entry fits the specific observance?","kind":"action"}]}]},{"id":"movable","name":"Movable","description":"Movable feasts.","findings":[{"id":"movable-finding","name":"Movable","description":"Movable.","questions":[{"text":"Which movable observances such as Lunar New Year and Carnival often fall in February, with sources?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"seasons","name":"Seasons","description":"Seasons and nature.","layers":[{"id":"seasons","name":"Seasons","description":"Seasons.","findings":[{"id":"seasons-finding","name":"Seasons","description":"Seasons.","questions":[{"text":"What is the season in February in each hemisphere, and what weather is typical?","kind":"provenance"},{"text":"Which entry fits winter?","kind":"action"}]}]},{"id":"history","name":"History","description":"Name and Roman origins.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did February get its name and its short length in the Roman calendar?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]}]},{"id":"context","name":"Context","description":"Culture and technology.","layers":[{"id":"culture","name":"Culture","description":"Culture.","findings":[{"id":"culture-finding","name":"Culture","description":"Culture.","questions":[{"text":"How does February appear in literature, proverbs and traditions?","kind":"provenance"},{"text":"Which entry fits the specific tradition?","kind":"action"}]}]},{"id":"software","name":"Software","description":"Leap day in software.","findings":[{"id":"software-finding","name":"Software","description":"Software.","questions":[{"text":"What software problems arise around 29 February, and how are they avoided?","kind":"provenance"},{"text":"Which entry fits leap year bug?","kind":"action"}]}]}]}]},"agentConduct":{"may":["State the number of days in February for a given year using the leap-year rule.","Validate dates so that February 29 is accepted only in leap years.","Schedule recurring February events with a stated rule for non-leap years."],"mustNot":["Accept February 30 or February 29 in a common year as a valid date.","Calculate monthly charges or interest for February without stating how the short month is handled.","Silently move a February 29 anniversary or deadline to another day."],"requiresHuman":["Choosing how a February 29 date applies in a non-leap year for contracts or birthdays with legal effect."]},"ethics":{"considerations":["Software bugs around February 29 have disrupted payments and systems.","People born on February 29 are often mishandled by forms and records."],"affectedParties":["People born on February 29","Account holders and payers","Users of date-dependent systems"]},"owners":{"steward":"The public: held in common; the calendar is maintained by convention and civil law.","roles":[],"masterSystems":[]},"relations":[{"target":"Q18602249","type":"parent","note":"registry parent class"},{"target":"month of the Gregorian calendar","type":"related","note":"in registry terms"},{"target":"January","type":"related","note":"the first month"},{"target":"March","type":"related","note":"the third month"},{"target":"leap day","type":"contains","note":"on 29 February in leap years"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.february","Wikidata: Q109 (https://www.wikidata.org/wiki/Q109)","ISO 8601: 02 month number"]},"properties":{"applicability":"not-applicable","items":["days: 28 or 29 count - leap years have 29","position: 2 month - Gregorian calendar","starts on same weekday as: March and November months - in common years"]},"recognition":{"applicability":"optional","items":["Second month, 28 or 29 days","Between January and March, winter in the north","Februarius was the last month of the early Roman year","Not a visible object; a page of the calendar."]},"capabilities":{"applicability":"required","items":["relay length and leap years","relay observances and seasons","explain name and history","route to specific days"]},"hazards":{"applicability":"required","items":["Leap year calculation errors","Software bugs around 29 February","Confusing observance dates across countries"]},"interfaces":{"applicability":"required","items":["ISO 8601 date representation","Gregorian leap year rules","National public holiday laws for February observances"]},"context":{"applicability":"required","items":["Not applicable; a calendar month.","February in common years","February in leap years","February in the Julian and Gregorian calendars","February in other calendar traditions and names","observances in February"]}},"sources":[{"title":"Wikidata item Q109: February","url":"https://www.wikidata.org/wiki/Q109","note":"identity and sense of the item"},{"title":"Wikipedia: February","url":"https://en.wikipedia.org/wiki/February","note":"general description of the item"}],"openQuestions":["Should leap day be the primary linked entry?","How should observances be linked through day entries?","How should names of February in other languages be recorded?"],"resources":{"spec":"/models/things/publications/thing-q109/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q109/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T01:51:10Z","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 2026-10-06T19:51:53+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}}