Question: When did the republic of ireland became independent?

Disambiguated questions and answers:
context: In accordance with the treaty, on 6 December 1922 the entire island of Ireland became a self-governing Dominion called the Irish Free State ("Saorstát Éireann"). Under the Constitution of the Irish Free State, the Parliament of Northern Ireland had the option to leave the Irish Free State one month later and return to the United Kingdom. During the intervening period, the powers of the Parliament of the Irish Free State and Executive Council of the Irish Free State did not extend to Northern Ireland. Northern Ireland exercised its right under the treaty to leave the new Dominion and rejoined the United Kingdom on 8 December 1922. It did so by making an address to the King requesting, "that the powers of the Parliament and Government of the Irish Free State shall no longer extend to Northern Ireland." The Irish Free State was a constitutional monarchy sharing a monarch with the United Kingdom and other Dominions of the British Commonwealth. The country had a governor-general (representing the monarch), a bicameral parliament, a cabinet called the "Executive Council", and a prime minister called the President of the Executive Council.
question: When did the republic of ireland became independent as the Irish Free State?
short_answers: 6 December 1922
wikipage: Republic of Ireland
context: On 18 April 1949 the Republic of Ireland Act 1948, which had been enacted by the Oireachtas, came into force. That legislation described Ireland as the Republic of Ireland but did not change the country's name. The international and diplomatic functions previously vested in or exercised by the king were now vested in the President of Ireland who finally became unambiguously the Irish head of state. Under the Commonwealth rules then in force, the declaration of a republic automatically terminated the state's membership of the British Commonwealth. Unlike India, which became a republic shortly afterwards, Ireland chose not to reapply for admittance to the Commonwealth.
question: When did the republic of ireland became independent under the terms of the Republic of Ireland Act 1948?
short_answers: 18 April 1949
wikipage: History of the Republic of Ireland

Long-form answers:
knowledge: content: From the Act of Union on 1 January 1801, until 6 December 1922, the island of Ireland was part of the United Kingdom of Great Britain and Ireland. During the Great Famine, from 1845 to 1849, the island's population of over 8 million fell by 30%. One million Irish died of starvation and/or disease and another 1.5 million emigrated, mostly to the United States.[29] This set the pattern of emigration for the century to come, resulting in constant population decline up to the 1960s.
wikipage: Republic of Ireland
content: Ireland remained neutral during World War II, a period it described as The Emergency.[46] Ireland's Dominion status was terminated with the passage of the Republic of Ireland Act 1948, which came into force on 18 April 1949 and declared that the state was a republic.
wikipage: Republic of Ireland
content: However, from the 1880s, there had been long-standing nationalist agitation for autonomy or Home Rule. Other, more radical voices such as the Irish Republican Brotherhood called for independence, but these were in a minority.
wikipage: History of the Republic of Ireland
long_answer: From the Act of Union on 1 January 1801, until 6 December 1922, the island of Ireland was part of the United Kingdom of Great Britain and Ireland. However, from the 1880s, there had been long-standing nationalist agitation for autonomy or Home Rule. Other, more radical voices such as the Irish Republican Brotherhood called for independence, but these were in a minority. The republic of Ireland became independent under the terms of the Republic of Ireland act on 18 April 1949 and it was declared that the state was a republic.