Migrating Norwegian P39/P580s

no-p39-p580.md

A term of the Norwegian Storting always starts on October 1st. When that's a Sunday, the opening is the next day instead (October 2nd), but any memberships of that term do still start on the 1st.

So we want to udpate any P39/P580s which are listed with that October 2nd date to the October 1st date instead.

(See conversation at https://www.wikidata.org/w/index.php?title=Wikidata%3ARequest_a_query&type=revision&diff=1241548292&oldid=1241336300)

In recent years this affects the 2017-2021 and 1989-1993 terms.

We can find these via:

oct2.rq:

module.exports = year => `
  SELECT ?ps ?item ?start
  WHERE {
    ?item p:P39 ?ps .
    ?ps ps:P39 wd:Q9045502 ; pq:P580 ?start .
    FILTER (?start = "${year}-10-02T00:00:00Z"^^xsd:dateTime)
  }
`

and then running:

wd sparql oct2.js 2017 | jq -r '.[] | "\(.ps) P580 2017-10-02 2017-10-01"' | wd uq --batch 

(And tweaked accordingly for another year)

These went through as:

• 2017: https://tools.wmflabs.org/editgroups/b/wikibase-cli/12e97b148b6df/
• 1989: https://tools.wmflabs.org/editgroups/b/wikibase-cli/f916c05dd8898/