A changelog of verified official facts: UK tax and National Insurance thresholds, exam specifications, and official vehicle datasets (French RappelConso recalls, Japanese MLIT recalls and complaints), plus central-bank policy rates (Bank of England, Fed, ECB). Each entry records what changed (from → to), when it took effect, the official source, the date it was verified, and a maintainer note. Entries are generated by scripts from committed data files and annotated by the maintainer — never written from memory. Coverage starts 2026-08-31.
Also available as RSS, Atom, JSON at /api/changes?since=YYYY-MM-DD, or over MCP: the what_changed_since tool at POST /api/mcp takes a date (an agent's training cutoff) and returns the entries after it.
First derivation: In the observing states and territories daylight saving begins at 02:00 standard time on the first Sunday in October and ends at 03:00 daylight time on the first Sunday in April (southern-hemisphere summer, so a period starting in one year ends in the next). Transitions for 2026, 2027, 2028 computed from the rule; verified 2026-10-04.
First derivation: The Australian financial year runs from 1 July to 30 June; it is named for both years (2026–27). Source quoted in the data file; verified 2026-10-04.
First derivation: Brazil has had no daylight saving time since 2019: Decreto nº 9.772 of 26 April 2019 revoked the horário de verão. No transitions (not observed) — statute text not re-verified on the verification date, see the data file; verified 2026-10-04.
First derivation: Brazilian personal income tax (IRPF) is assessed on the ano-calendário — the calendar year — declared the following year. Government: Brazil's public-sector financial year coincides with the calendar year. Source quoted in the data file; verified 2026-10-04.
First derivation: For individuals the Canadian taxation year is the calendar year, 1 January to 31 December. Government: The Government of Canada's fiscal year runs from 1 April to 31 March. Source quoted in the data file; verified 2026-10-04.
First derivation: Summer time begins at 02:00 CET on the last Sunday in March (clocks to 03:00) and ends at 03:00 CEST on the last Sunday in October (clocks to 02:00) — the EU-wide arrangement of Directive 2000/84/EC, 01:00 UTC both ways. Transitions for 2026, 2027, 2028 computed from the rule; verified 2026-10-04.
First derivation of data/calendar.json for Germany: 561 holiday entries across 17 region(s) for 2026, 2027, 2028 from Bundesministerium des Innern (BMI) (Statutory texts and ministry pages are official works), fetched/verified 2026-10-04.
First derivation: German income tax is assessed for the calendar year (Veranlagungszeitraum = Kalenderjahr), 1 January to 31 December. Government: The German federal budget year is the calendar year. Source quoted in the data file; verified 2026-10-04.
First derivation: Metropolitan France follows the EU-wide arrangement: clocks forward at 02:00 on the last Sunday in March and back at 03:00 on the last Sunday in October (01:00 UTC both ways). Transitions for 2026, 2027, 2028 computed from the rule — statute text not re-verified on the verification date, see the data file; verified 2026-10-04.
First derivation of data/calendar.json for France: 72 holiday entries across 2 region(s) for 2026, 2027, 2028 from data.gouv.fr / DINUM — "Jours fériés en France" (API calendrier.api.gouv.fr) (Licence Ouverte / Open Licence version 2.0), fetched/verified 2026-10-04.
First derivation: French income tax (impôt sur le revenu) is assessed on the income of a calendar year, declared the following spring (the 2026 declaration covers 2025 income). Source quoted in the data file; verified 2026-10-04.
First derivation: India's financial year runs from 1 April to 31 March. From 1 April 2026 the Income Tax Act, 2025 replaces the Income Tax Act, 1961 and calls the twelve months from 1 April the 'tax year' (Tax Year 2026-27), discontinuing the 'previous year' / 'assessment year' terms. Source quoted in the data file; verified 2026-10-04.
First derivation: The Polish tax year is the calendar year unless a tax statute provides otherwise. Source quoted in the data file; verified 2026-10-04.
First derivation: Clocks go forward one hour at 01:00 GMT on the last Sunday in March and back one hour at 02:00 BST on the last Sunday in October. Transitions for 2026, 2027, 2028 computed from the rule; verified 2026-10-04.
First derivation of data/calendar.json for United Kingdom: 82 holiday entries across 3 region(s) for 2026, 2027, 2028 from GOV.UK (Government Digital Service) — bank-holidays.json (Open Government Licence v3.0), fetched/verified 2026-10-04.
First derivation: The UK tax year for individuals runs from 6 April to 5 April of the following year. Government: The UK government financial year runs from 1 April to 31 March. Source quoted in the data file; verified 2026-10-04.
First derivation: Clocks go forward one hour at 02:00 local time on the second Sunday in March and back one hour at 02:00 local time on the first Sunday in November, in every zone of a State that has not exempted itself. Transitions for 2026, 2027, 2028 computed from the rule; verified 2026-10-04.
First derivation of data/calendar.json for United States: 33 holiday entries across 1 region(s) for 2026, 2027, 2028 from U.S. Office of Personnel Management — federal holidays tables (Work of the United States Government — public domain), fetched/verified 2026-10-04.
First derivation: The US individual tax year is the calendar year, 1 January to 31 December (a fiscal year ending in another month is possible with IRS approval). Government: The US federal government fiscal year runs from 1 October to 30 September and is named for the calendar year in which it ends (FY2027 = 1 Oct 2026 – 30 Sep 2027). Source quoted in the data file; verified 2026-10-04.