{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.january-1","code":"thing-q2150","url":"https://ver.cy/models/thing/q2150/","name":"January 1","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.TME"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The first day of the year in the Gregorian calendar, with 364 days remaining (365 in leap years), observed as New Year Day and a public holiday in most countries; also observed as the World Day of Peace in the Catholic Church.","purpose":"Let an agent handle January 1 as a calendar date with weekday computation, observances, legal effects and sourced events.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["First day of the Gregorian year","Public holiday in most countries","Common effective date for laws","Other calendars have different new years"],"structure":{"bundles":[{"id":"date","name":"Date","description":"Calendar facts.","layers":[{"id":"weekday","name":"Weekday","description":"Computation.","findings":[{"id":"weekday-finding","name":"Weekday","description":"Weekday.","questions":[{"text":"On which weekday does January 1 fall in this year?","kind":"measurement"},{"text":"Is the year a leap year?","kind":"boundary"}]}]},{"id":"software","name":"Software","description":"Year boundaries.","findings":[{"id":"software-finding","name":"Software","description":"Year-boundary handling.","questions":[{"text":"Does software handle the year change and week numbering correctly?","kind":"boundary"},{"text":"Which ISO week does January 1 fall in?","kind":"measurement"}]}]}]},{"id":"observances","name":"Observances","description":"New Year.","layers":[{"id":"holiday","name":"Holiday","description":"Public holiday.","findings":[{"id":"holiday-finding","name":"Holiday","description":"New Year Day.","questions":[{"text":"Is January 1 a public holiday here, and what closes?","kind":"provenance"},{"text":"Is there a substitute day if it falls on a weekend?","kind":"provenance"}]}]},{"id":"other-new-years","name":"Other new years","description":"Calendars.","findings":[{"id":"other-new-years-finding","name":"Other new years","description":"Other new years.","questions":[{"text":"Which communities celebrate the new year on other dates?","kind":"provenance"},{"text":"When are they this year?","kind":"measurement"}]}]}]},{"id":"law","name":"Law","description":"Effective dates.","layers":[{"id":"effective","name":"Effective","description":"New rules.","findings":[{"id":"effective-finding","name":"Effective","description":"Laws in force.","questions":[{"text":"Which laws or rates take effect on January 1 this year?","kind":"provenance"},{"text":"From which official source?","kind":"provenance"}]}]},{"id":"tax","name":"Tax year","description":"Fiscal years.","findings":[{"id":"tax-finding","name":"Tax","description":"Tax year.","questions":[{"text":"Does the tax year start on January 1 here?","kind":"provenance"},{"text":"What deadlines follow?","kind":"measurement"}]}]}]},{"id":"history","name":"History","description":"Past events.","layers":[{"id":"events","name":"Events","description":"On this day.","findings":[{"id":"events-finding","name":"Events","description":"Historical events.","questions":[{"text":"Which notable events happened on January 1, according to reliable sources?","kind":"provenance"},{"text":"Are dates in the same calendar?","kind":"boundary"}]}]},{"id":"origin","name":"Origin","description":"Why January.","findings":[{"id":"origin-finding","name":"Origin","description":"Origin.","questions":[{"text":"Why does the year begin on January 1 in the Gregorian calendar?","kind":"provenance"},{"text":"When did different countries adopt it?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Give the date's calendar facts and observances.","Note that some cultures mark the new year on other dates."],"mustNot":["Assume every user celebrates New Year on this day.","Schedule work or contact on a public holiday without regard to local rules."],"requiresHuman":["Scheduling shifts or deadlines on this public holiday."]},"ethics":{"considerations":["Holidays reflect cultural and religious traditions that differ between people.","Workers have legal rights on public holidays."],"affectedParties":["People observing other calendars","Workers"]},"owners":{"steward":"Nobody owns a date; governments declare public holidays.","roles":[],"masterSystems":[]},"relations":[{"target":"Q11186375","type":"parent","note":"registry parent class"},{"target":"Q115675388","type":"parent","note":"registry parent class"},{"target":"Q34812","type":"parent","note":"registry parent class"},{"target":"January","type":"related","note":"month"},{"target":"New Year","type":"related","note":"holiday"},{"target":"calendar date","type":"related","note":"category"},{"target":"ISO 8601","type":"related","note":"notation"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.january-1","Wikidata: Q2150 (https://www.wikidata.org/wiki/Q2150)","ISO 8601: --01-01 recurring date"]},"properties":{"applicability":"not-applicable","items":["day of year: 1 day","days remaining: 364 or 365 days - common or leap year"]},"recognition":{"applicability":"optional","items":["Written 1 January or January 1","ISO format --01-01","Other calendars start the year on different dates","A date on calendars, often marked by celebrations."]},"capabilities":{"applicability":"required","items":["compute its weekday in a given year","list observances and closures","check laws taking effect on January 1","find sourced historical events"]},"hazards":{"applicability":"required","items":["Assuming all cultures celebrate the new year on this date","Year-boundary software bugs","Unsourced events"]},"interfaces":{"applicability":"required","items":["ISO 8601","National public holiday laws"]},"context":{"applicability":"required","items":["Start of the calendar year, holidays and legal effective dates.","the recurring calendar date","specific dated days in given years"]}},"sources":[{"title":"Wikidata item Q2150: January 1","url":"https://www.wikidata.org/wiki/Q2150","note":"identity and sense of the item"},{"title":"Wikipedia: January 1","url":"https://en.wikipedia.org/wiki/January_1","note":"general description of the item"}],"openQuestions":["Should dated days be separate entries?","How should other new years be linked?","How should laws effective on January 1 be tracked?"],"resources":{"spec":"/models/things/publications/thing-q2150/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q2150/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T09:12:59Z","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 2026-10-06T19:51:57+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties."},"score":1.0}}