May - Dáil Éireann passes the Executive Authority (Consequential Provisions) Act, 1937 which retrospectively abolished the office of Governor-General of the Irish Free State. The abolition was retrospectively dated back to December 1936.
June/July - Dáil Éireann debates and passes the draft new constitution of Éire, to be called Bunreacht na hÉireann. The new constitution is then submitted for public approval by plebiscite.
December - The Marijuana Tax Act is signed, killing the US hemp industry just as it was about to benefit from a mechanised brake and compete with cotton and wood pulp.
December 3 - The Dandy, the world's longest running comic, was first published.
December 29 - New Irish Constitution, Bunreacht na hÉireann comes into force. The Irish Free State becomes Éire. Eamon de Valera becomes the first Taoiseach (prime minister) of the new state. A Presidential Commission (made up the Irish Chief Justice, the Speaker of Dáil Éireann and the President of the High Court) assumes the powers of the new presidency of Ireland pending the election of the first president in June 1938.
