<P> The partition of Ireland ( Irish : críochdheighilt na hÉireann ) was the division of the island of Ireland into two distinct jurisdictions , Northern Ireland and Southern Ireland . It took place on 3 May 1921 under the Government of Ireland Act 1920 . Today the former is still known as Northern Ireland and forms part of the United Kingdom , while the latter is now a sovereign state also named Ireland and sometimes called the Republic of Ireland . </P>
<P> The partition of Ireland ( Irish : críochdheighilt na hÉireann ) was the division of the island of Ireland into two distinct jurisdictions , Northern Ireland and Southern Ireland . It took place on 3 May 1921 under the Government of Ireland Act 1920 . Today the former is still known as Northern Ireland and forms part of the United Kingdom , while the latter is now a sovereign state also named Ireland and sometimes called the Republic of Ireland . </P>
when did northern ireland and southern ireland separate
when did northern ireland and southern ireland separate
3 May 1921
3 May 1921