{ "protocol": "verified-changes/0.1", "publisher": { "name": "Data Butler", "url": "https://databutler.dev/" }, "updated": "2026-11-01", "coverageStart": "2026-08-31", "areas": [ { "name": "uk-rates", "description": "UK tax-year rates and thresholds verified against gov.uk: income tax, National Insurance, minimum wage, student loans, VAT, ISA, pensions, stamp duty, capital gains, dividends, savings and marriage allowances, State Pension and State Pension age, statutory sick/maternity/paternity pay, Child Benefit.", "cadence": "Every 6 April (new tax year) and after each Budget or Autumn Statement; minimum wage on 1 April; every source page re-fetched weekly." }, { "name": "uk-exams", "description": "UK exam-board specifications verified against the boards' own pages: which topic sits on which paper, durations, marks, weightings. AQA GCSE sciences and maths so far.", "cadence": "Each September and on any published specification update; every source page re-fetched weekly." }, { "name": "vehicles", "description": "Official vehicle recall datasets: DVSA (UK), RappelConso (France) and MLIT (Japan) recalls and complaints; EU Safety Gate is a stub.", "cadence": "Monthly." }, { "name": "software-eol", "description": "Support and end-of-life dates for 14 runtimes and operating systems (endoflife.date snapshot): dataset additions, new cycles, moved or reached end-of-life dates", "cadence": "monthly" }, { "name": "policy-rates", "description": "Central-bank policy rates verified against the banks' own pages: Bank of England Bank Rate, US Federal Reserve federal funds target range, ECB key interest rates (deposit facility, main refinancing, marginal lending).", "cadence": "After each scheduled decision (eight a year per bank); re-verified within 45 days of verifiedDate; every source page re-fetched weekly." }, { "name": "us-rates", "description": "US federal rates and thresholds read from the IRS revenue procedures and notices and SSA's Federal Register notice: income-tax rate schedules and standard deduction, Social Security wage base and rates, Medicare, retirement-plan and IRA limits, HSA limits, estate and gift exclusions, Social Security benefit rules, Medicare costs and IRMAA, RMD tables, capital-gains thresholds.", "cadence": "Annual: after the IRS tax-year inflation adjustments (October), the retirement-plan limits (November), the SSA Federal Register notice (October/November) and the CMS Medicare amounts (November); source pages re-fetched weekly, ssa.gov read by hand." }, { "name": "de-rates", "description": "German tax and social-insurance figures read from the consolidated statutes, the Bundesgesetzblatt and the BMG/DRV/BMAS pages: Grundfreibetrag and § 32a tariff, Solidaritätszuschlag, Beitragsbemessungsgrenzen and Beitragssätze, Zusatzbeitrag, Mindestlohn, Geringfügigkeitsgrenze, Kindergeld, Kinderfreibetrag, Pauschbeträge, Entfernungspauschale, Umsatzsteuer (allgemeiner und ermäßigter Steuersatz).", "cadence": "Annual: after the Sozialversicherungsrechengrößen-Verordnung and the Zusatzbeitrag announcement (November), and any Steuergesetz changing § 32a EStG for the next Veranlagungszeitraum; the Umsatzsteuer rates only when a Gesetz amends § 12 UStG (irregular); every source page re-fetched weekly." }, { "name": "uk-vehicle-rules", "description": "UK vehicle tax (VED) and MOT rules verified against gov.uk: first-year rates by CO2 band, the standard rate, the expensive car supplement, 2001–2017 bands, pre-2001 engine-size rates, electric-vehicle rules since April 2025, historic-vehicle exemptions, MOT due dates, maximum fees, early renewal, retests, exemptions and penalties.", "cadence": "Every 1 April (VED rates and the historic-vehicle exemption date move with the Finance Act) and after each Budget; MOT fees and rules when DVSA changes them; every source page re-fetched weekly." }, { "name": "uk-exam-dates", "description": "UK exam calendar facts verified against JCQ and the boards' own documents: GCSE and A-level results days, the summer exam timetable (JCQ window, contingency day, dates of the most-asked papers at AQA, Pearson Edexcel, Cambridge OCR, WJEC/Eduqas), entry deadlines and late-fee dates, Scotland's results day, and announced specification changes with first-teaching and first-exam years.", "cadence": "Annual, calendar-driven: when JCQ and the boards publish the following summer's final timetables (early in the calendar year) and the results days; the weekly watcher hashes the JCQ and board timetable pages" }, { "name": "calendar", "description": "Public holidays (UK, US federal, German Länder, France), tax-year starts/ends (nine countries) and daylight-saving switch dates for 2026–2028: new years published, holidays added or moved, rule changes", "cadence": "monthly" }, { "name": "uk-gov-process", "description": "UK government service facts verified against gov.uk: passport fees (UK and overseas), driving licence renewal and provisional licences, change of address, vehicle tax and SORN, voter registration, birth and death registration, Blue Badge, Self Assessment deadlines and Making Tax Digital, National Insurance numbers, Universal Credit, EU Settlement Scheme, eVisa and ETA — fees, processing times, eligibility, start URLs and dated changes.", "cadence": "Re-verified against the gov.uk pages every 30 days and on fee-change days (Home Office fees usually move in April); every source page re-fetched weekly through the gov.uk content API." }, { "name": "jp-vehicle-costs", "description": "Japan vehicle statutory costs verified against MLIT, FSA, NALTEC, 総務省, Tokyo and Kōtō City pages: 自動車重量税 at 車検 (eco/standard/13-year/18-year, per 0.5 t and kei), エコカー減税 bands, 自賠責保険 rates before and from 2026-11-01, 継続検査 fees from 2026-04-01, 自動車税 by displacement and 軽自動車税.", "cadence": "Re-verified against the official pages every 35 days and on the known change dates (自賠責 revisions, last 2026-11-01; car taxes each 1 April; weight-tax eco bands 2027-05-01); every source page re-fetched weekly." }, { "name": "jp-living-costs", "description": "Japan daily-life official figures verified against MHLW, NTA, 総務省, 内閣府, こども家庭庁, 日本年金機構 and 協会けんぽ pages: 地域別最低賃金 FY2026 by prefecture with effective dates, 協会けんぽ health insurance rates by prefecture, 介護 and 子ども・子育て支援金 rates, 厚生年金 and 国民年金, 雇用保険料率, 児童手当, 出産育児一時金, 高額療養費, the 2027 holidays, 消費税, 基礎控除, 給与所得控除 and 住民税 均等割.", "cadence": "Re-verified against the official pages every 35 days and on the known change dates (prefecture minimum wages 2026-10-01 to 2026-12-02 and each autumn, deductions 2026-12-01, insurance and pension rates each March/April, 高額療養費 2027-08-01, the 2028 holidays in February 2027); every source page re-fetched weekly." }, { "name": "uk-inflation", "description": "UK consumer price inflation read from the ONS time series: CPI and CPIH 12-month rates for the latest month, the CPI index (2015=100) and CPI annual rates per calendar year, each with its reference period and ONS release day.", "cadence": "Monthly, on the ONS CPI release day (stated as nextRelease in the series); every source page re-fetched weekly" }, { "name": "us-inflation", "description": "US inflation from the Bureau of Labor Statistics: CPI-U (all items, U.S. city average, not seasonally adjusted) 12-month percent change, index level and annual averages, each with its reference month and BLS release day.", "cadence": "Monthly, on the BLS CPI release day; every source page re-fetched weekly" } ], "endpoints": { "json": "https://databutler.dev/api/changes", "html": "https://databutler.dev/changes", "rss": "https://databutler.dev/changes.rss", "atom": "https://databutler.dev/changes.atom", "mcp": { "url": "https://databutler.dev/api/mcp", "tool": "what_changed_since" } }, "schema": "https://databutler.dev/schema/changes.v0.json", "specification": "https://databutler.dev/protocol", "licence": "Free to reuse with attribution to databutler.dev. Each entry's underlying fact belongs to the linked official source and stays under that source's terms (for gov.uk, the Open Government Licence v3.0).", "contact": "https://github.com/physics-star-cat/databutler/issues", "facts": "https://databutler.dev/.well-known/facts.json" }