Detailed primary-source provenance index

The Government occasionally declares extra non-working days between 1 and 6 January by separate decision; those one-off additions are not modelled.

• Government of Armenia — public holidays and commemoration days

Two Argentine mechanisms are deliberately NOT computed because they are discretionary, not algorithmic: the up-to-three 'días no laborables con fines turísticos' the executive decrees each year, and Decreto 614/2025, which lets the Jefatura de Gabinete move a trasladable that lands on a Saturday or Sunday to the adjacent Friday or Monday. Religious days for Jewish and Muslim workers are personal entitlements, not general holidays, and are excluded.

• Ley 27.399 — Feriados nacionales y fines de semana largos (Argentina.gob.ar)

• Arbeitsruhegesetz §7 (Rechtsinformationssystem des Bundes)

• australia.gov.au — public holidays

• Belgium.be — legal holidays

1 November (Day of the National Awakeners) is a non-attendance day for schools rather than a general day off, so it is typed as an observance.

• Council of Ministers of Bulgaria — official holidays

• Ministerio de Trabajo, Empleo y Previsión Social de Bolivia

• Lei nº 662/1949 — feriados nacionais (Planalto)

The Council of Ministers issues an annual decree moving individual working days to create long weekends; those year-specific transfers are not modelled.

• Official Internet Portal of the President of the Republic of Belarus — holidays
• National Legal Internet Portal of the Republic of Belarus

• Government of Canada — general holidays for federally regulated employees

• Swiss Federal Constitution art. 110(3) — 1 August (Fedlex)

• Ley 51 de 1983 ('Ley Emiliani') — Función Pública, Gestor Normativo

• Ministry of Labour and Social Insurance, Republic of Cyprus

• Zákon č. 245/2000 Sb., o státních svátcích (Zákony pro lidi)

• Einigungsvertrag art. 2(2) — Day of German Unity (Gesetze im Internet)

• Lov nr. 214 af 2023 om konsekvenser ved afskaffelsen af store bededag (Retsinformation)

• Public Holidays and Days of National Importance Act (Riigi Teataja, English)

• Estatuto de los Trabajadores art. 37.2 (BOE-A-1995-7730)

• Laki eräiden juhlapäivien siirtämisestä (388/1937, Finlex)

• Code du travail art. L3133-1 (Légifrance)

• GOV.UK — UK bank holidays

When 1 May collides with Holy Week or Easter the Ministry of Labour moves Labour Day by an annual decision; that year-specific move is not computed here.

• Hellenic Ministry of Labour and Social Security

• Ministerio de Trabajo y Previsión Social de Guatemala — Código de Trabajo art. 127

• Zakon o blagdanima, spomendanima i neradnim danima u RH (Narodne novine 110/2019)

Hungary's annual working-day rearrangement decree (áthelyezett munkanapok — Saturdays worked to bridge a holiday) is issued each year by the minister and is not modelled.

• 2012. évi I. törvény a munka törvénykönyvéről §102 (Nemzeti Jogszabálytár)

• Citizens Information (Ireland) — public holidays

Only the three nationally uniform holidays are computed. The Department of Personnel & Training's gazetted list (17 days in 2026) additionally contains Holi, Diwali, Eid, Guru Nanak Jayanti and similar festivals whose dates come from lunar/lunisolar/Hijri calendars and are notified annually — those are NOT included, and neither are any state holidays.

• National Portal of India — holiday calendar

• Lög nr. 88/1971 um 40 stunda vinnuviku (Alþingi)

• Legge 27 maggio 1949, n. 260 (Normattiva)

Equinox Day dates use the standard published closed form, which reproduces every date the National Astronomical Observatory of Japan has gazetted in its 暦要項 for 1980–2099; NAOJ's February announcement for the following year remains the legally binding source. This ruleset is verified for 1988–2099.

• Cabinet Office of Japan — 国民の祝日について
• National Astronomical Observatory of Japan — 暦要項 (equinox dates)

Idd-ul-Fitr and Idd-ul-Azha are gazetted Kenyan public holidays but follow the Hijri calendar and are declared per year, so they are NOT computed here. The President may also gazette additional one-off public holidays.

• Public Holidays Act, Cap. 110 (Kenya Law)

Korea's lunar holidays are NOT included: Seollal (Lunar New Year, 3 days), Chuseok (3 days) and Buddha's Birthday follow the Korean lunisolar calendar published by KASI and are not computed here — nor are the substitute days they generate. New Year's Day and Memorial Day are excluded from the substitute rule by the Regulations, and that exclusion is modelled.

• Korea Law Information Center — Regulations on Holidays of Government Offices

Kurban Ait (Eid al-Adha) is a public holiday in Kazakhstan but follows the Hijri calendar and is announced per year, so it is NOT included here. Orthodox Christmas (7 January) was a holiday up to and including 2022 and is modelled accordingly.

• Law of the Republic of Kazakhstan on Holidays (Adilet, English)

• Liechtensteinische Gesetzessammlung (LILEX) — Sonn- und Feiertagsgesetz

• Lietuvos Respublikos darbo kodeksas, 123 straipsnis (e-seimas)

• Guichet.lu — statutory public holidays

• Law On Public Holidays (Likumi.lv, English)

Morocco's five religious holidays — Fatih Muharram (Islamic New Year), Aid Al Mawlid, Aid Al Fitr and Aid Al Adha (two days each for Mawlid, Fitr and Adha) — follow the Hijri calendar and are announced per year, so they are NOT computed here.

• Royaume du Maroc — portail national Maroc.ma

• National Holidays and Other Public Holidays Act, Cap. 252 (Laws of Malta)

• Secretaría del Trabajo y Previsión Social — Ley Federal del Trabajo art. 74

Nigeria's five Islamic public holidays — Eid-el-Fitr (2 days), Eid-el-Kabir (2 days) and Eid-el-Maulud — follow the Hijri calendar and are declared per year by the Minister of Interior, so they are NOT computed here. The Minister also declares weekend-substitute days case by case, so no automatic substitution is applied.

• Federal Ministry of Interior, Nigeria — public holiday declarations

• Rijksoverheid — officiële feestdagen

• Lov om helligdager og helligdagsfred (LOV-1995-02-24-12, Lovdata)

• Employment New Zealand — public holidays and anniversary dates

• Ministerio de Trabajo y Desarrollo Laboral de Panamá (MITRADEL) — Código de Trabajo

• gob.pe — feriados y días no laborables

Eid'l Fitr and Eid'l Adha are regular holidays in the Philippines but follow the Hijri calendar and are proclaimed per year, so they are NOT computed here; neither is the Chinese New Year special day. Republic Act 9492 also lets the President move holidays to the nearest Monday — recent proclamations have kept them on their statutory dates, which is what this ruleset returns.

• Official Gazette of the Republic of the Philippines — nationwide holidays

• Ustawa o dniach wolnych od pracy (Dz.U. 1951 nr 4 poz. 28, ISAP)

• Código do Trabalho art. 234 (Diário da República)

• Inspecția Muncii — Codul muncii (Legea 53/2003) art. 139

• National Bank of Serbia — public holidays and non-working days

• Lag (1989:253) om allmänna helgdagar (Sveriges riksdag)

Six of Singapore's eleven gazetted public holidays are NOT computed here because they follow lunar or Hijri calendars and are gazetted per year by the Ministry of Manpower: Chinese New Year (2 days), Hari Raya Puasa, Hari Raya Haji, Vesak Day and Deepavali.

• Ministry of Manpower, Singapore — public holidays

• Zakon o praznikih in dela prostih dnevih v Republiki Sloveniji (PISRS)

• Zákon č. 241/1993 Z. z. o štátnych sviatkoch, dňoch pracovného pokoja a pamätných dňoch (Slov-Lex)
• Národný inšpektorát práce — sviatky 8. máj a 15. september 2026

• Repubblica di San Marino — official government portal

Thailand's four Buddhist holy days — Makha Bucha, Visakha Bucha, Asahna Bucha and the first day of Buddhist Lent (Khao Phansa) — follow the Thai lunar calendar and are announced per year, so they are NOT computed here. Extra one-off bridge days that the Cabinet grants each year are also excluded.

• Bank of Thailand — financial institutions' holidays

Türkiye's two religious holidays — Ramazan Bayramı (3.5 days) and Kurban Bayramı (4.5 days) — follow the Hijri calendar and are NOT computed here, and neither are the extra bridge days the Cabinet grants around them in some years.

• 2429 sayılı Ulusal Bayram ve Genel Tatiller Hakkında Kanun (Mevzuat Bilgi Sistemi)

Under martial law the guarantee of a day off on these dates is suspended (Law No. 2136-IX on the organisation of labour relations under martial law), so the dates below are the statutory holidays rather than a promise that workplaces close.

• Кодекс законів про працю України, ст. 73 (Верховна Рада)

• U.S. Office of Personnel Management — federal holidays

• Government of South Africa — public holidays (Public Holidays Act 36 of 1994)