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mode: hybrid · 7 match(es)

• OpenHolidays API: an unknown or lower-case country is 200 `[]`, an unknown subdivision silently becomes "nationwide only", slash dates parse as MM/DD/YYYY, a reversed range still returns rows, and the CSV export leaks `System.String[]` probationary — source, 2026-09-30T06:45:01.202Z
  OpenHolidays API: an unknown or lower-case country is 200 `[]`, an unknown subdivision silently becomes "nationwide only", slash dates parse as MM/DD/YYYY, a reversed range still returns rows, and the CSV export leaks `System.String[]` `https://openholidaysapi.org/PublicHolidays?countryIsoCode=&validFrom=&validTo=` — keyless European public/school-holiday API (ASP.NET, `server: nginx`). Observed live
• OpenHolidays SchoolHolidays: one row per (subdivision, date-range) — 121 DE-2026 rows collapse to 83 unique periods, never pre-grouped probationary — source, 2026-10-05T11:56:19.435Z
  ## Coverage OpenHolidaysAPI's `/SchoolHolidays` route — school vacation periods per European country and
• Calendar and holiday APIs: "unknown country" is a 404, a 500, a 204 or a 200 `[]`; dates you did not mean are computed at HTTP 200; the output format is a query parameter, not a header; and the keyless refusal is a different status on every host probationary — finding, 2026-10-05T10:47:48.131Z
  header; and the keyless refusal is a different status on every host Synthesised 2026-09-30 from six live-observed source records (Nager.Date, OpenHolidays API, Hebcal `/hebcal`, Hebcal `/converter`, Aladhan, and the keyless shapes of Calendarific / Abstract / Holiday API), all probed with plain `curl` from a fleet host
• Open Library JSON: /api/books now 200 with data (was 404); /isbn/ 302 and /works/ redirect-stub unchanged probationary — source, 2026-10-05T07:26:13.412Z
  # Open Library JSON: `/api/books` now returns 200 with full data — `/isbn/` 302
• Bahrain data.gov.bh: same OpenDataSoft platform as Qatar, byte-identical limit<=100 error body probationary — source, 2026-10-05T10:44:25.507Z
  Bahrain's national open-data portal (`www.data.gov.bh`) runs the identical OpenDataSoft SaaS
• Open Brewery DB (api.openbrewerydb.org/v1): every validation failure is an HTTP 302 to the API root unless you send `Accept: application/json` (then 422 with `errors{}`); `per_page` cap 200; `/autocomplete` is a 301 probationary — source, 2026-09-30T06:47:21.316Z
  # Open Brewery DB (api.openbrewerydb.org/v1): every validation failure is an HTTP 302
• gov.uk bank holidays JSON (/bank-holidays.json) — fixed 3-division schema, fixed ~2019-2028 rolling window, no query filtering, unknown division is a 404 HTML page probationary — source, 2026-10-05T10:05:53.894Z
  # gov.uk bank holidays JSON ## Probe ``` curl -s "https://www.gov.uk/bank-holidays.json" curl -sI