{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.may-27","code":"thing-q2587","url":"https://ver.cy/models/thing/q2587/","name":"May 27","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.4","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.TME"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"May 27, day 147 (day 148 in leap years) of the year in the Gregorian calendar, with 218 days remaining in both common and leap years. May 27 is the anniversary of the opening of the Golden Gate Bridge in 1937, of the 1905 Battle of Tsushima, and of the founding of Saint Petersburg on May 27, 1703 Gregorian, corresponding to May 16 Old Style; it also marks Children's Day in Nigeria and the 1967 Australian referendum on Aboriginal rights.","purpose":"Let an agent handle May 27 as a calendar date with weekday computation, observances attributed to their traditions and sourced events.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["The twenty-seventh day of May","Weekday varies by year","Observances vary by place","Julian and Gregorian dates differ by 13 days in this era"],"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 May 27 fall in this year?","kind":"measurement"},{"text":"Is it a leap year?","kind":"boundary"}]}]},{"id":"calendar","name":"Calendar","description":"Julian or Gregorian.","findings":[{"id":"calendar-finding","name":"Calendar","description":"Calendar system.","questions":[{"text":"Is the Julian or Gregorian calendar meant?","kind":"boundary"},{"text":"What is the equivalent date in the other calendar?","kind":"measurement"}]}]}]},{"id":"observances","name":"Observances","description":"Holidays.","layers":[{"id":"holiday","name":"Holiday","description":"Public holiday.","findings":[{"id":"holiday-finding","name":"Holiday","description":"Holiday status.","questions":[{"text":"Is May 27 a public holiday or observance here?","kind":"provenance"},{"text":"Which tradition or law sets it?","kind":"provenance"}]}]},{"id":"attribution","name":"Attribution","description":"Traditions.","findings":[{"id":"attribution-finding","name":"Attribution","description":"Attributed observances.","questions":[{"text":"Which countries or communities observe something on this date, according to them?","kind":"provenance"},{"text":"Is the observance attributed rather than assumed?","kind":"boundary"}]}]}]},{"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 May 27, according to reliable sources?","kind":"provenance"},{"text":"Are dates given in the same calendar?","kind":"boundary"}]}]},{"id":"anniversaries","name":"Anniversaries","description":"Recurring.","findings":[{"id":"anniversaries-finding","name":"Anniversaries","description":"Anniversaries.","questions":[{"text":"Which anniversaries fall on this date this year?","kind":"provenance"},{"text":"Which are round numbers?","kind":"measurement"}]}]}]},{"id":"planning","name":"Planning","description":"Scheduling.","layers":[{"id":"countdown","name":"Countdown","description":"Days until.","findings":[{"id":"countdown-finding","name":"Countdown","description":"Countdown.","questions":[{"text":"How many days until the next May 27?","kind":"measurement"},{"text":"From which date?","kind":"definition"}]}]},{"id":"work","name":"Work","description":"Working day.","findings":[{"id":"work-finding","name":"Work","description":"Working day.","questions":[{"text":"Is it a working day for this organisation?","kind":"provenance"},{"text":"Do deadlines move?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Report May 27 as day 147, or 148 in leap years, of the Gregorian calendar.","List sourced events on May 27, such as the 1905 Battle of Tsushima and the 1937 opening of the Golden Gate Bridge."],"mustNot":["Give the founding of Saint Petersburg on May 27, 1703 without noting that this is the Gregorian date, corresponding to May 16 Old Style.","Present Children's Day in Nigeria as observed everywhere.","Report the 1967 Australian referendum without its significance for Aboriginal people.","Add on-this-day events without a source."],"requiresHuman":["Scheduling public commemorations or messages tied to sensitive anniversaries on this date."]},"ethics":{"considerations":["Anniversaries such as the 1967 referendum matter deeply to the peoples they concern.","Errors in date reporting spread quickly in on-this-day lists."],"affectedParties":["Aboriginal and Torres Strait Islander peoples","Readers","Nigerian children and families"]},"owners":{"steward":"Nobody owns a date; the Gregorian calendar is held in common.","roles":[],"masterSystems":[]},"relations":[{"target":"Q11187356","type":"parent","note":"registry parent class"},{"target":"May","type":"related","note":"month"},{"target":"May 26","type":"related","note":"date"},{"target":"calendar date","type":"related","note":"category"},{"target":"ISO 8601","type":"related","note":"notation"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.may-27","Wikidata: Q2587 (https://www.wikidata.org/wiki/Q2587)","ISO 8601: --05-27 recurring date"]},"properties":{"applicability":"not-applicable","items":["day of year: 147 or 148 day - common year, leap year where different","days remaining: 218 days"]},"recognition":{"applicability":"optional","items":["Written 27 May or May 27","ISO format --05-27","Observances vary by country and tradition","A date on calendars."]},"capabilities":{"applicability":"required","items":["compute its weekday in a given year","check local and international observances","find sourced historical events","schedule events"]},"hazards":{"applicability":"required","items":["Assuming observances are universal","Unsourced on-this-day events","Mixing Julian and Gregorian dates"]},"interfaces":{"applicability":"required","items":["ISO 8601","National public holiday laws"]},"context":{"applicability":"required","items":["A calendar date for scheduling, holidays and anniversaries.","the recurring calendar date","specific dated days in given years"]}},"sources":[{"title":"Wikidata item Q2587: May 27","url":"https://www.wikidata.org/wiki/Q2587","note":"identity and sense of the item"},{"title":"Wikipedia: May 27","url":"https://en.wikipedia.org/wiki/May_27","note":"general description of the item"}],"openQuestions":["Should dated days be separate entries?","How should observances be linked?","How should events be sourced?"],"resources":{"spec":"/models/things/publications/thing-q2587/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q2587/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-13T14:25:16Z","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 2026-10-07T10:10:29+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}}