Blessed Pope John XXIII, of happy memory, convened the Second Vatican Council.
Pope John XXIII convened the Council and Pope Paul VI made the changes to the Mass.
Vatican II was called by Pope John XXIII.
The Second Vatican Council opened under Pope John XXIII on 11 October 1962 and closed under Pope Paul VI on 8 December 1965. As the name implies, it was convened in the Vatican.
Pope Pius IX convened the First Vatican Council which began in 1868. Pope John XXIII convened the Second Vatican Council which began in 1962. Pope Paul VI reconvened the Second Vatican Council in 1963 after it was suspended due to the death of Pope John. Pope John had to close the First Vatican Council before opening the Second Council since the First Council was never officially closed by Pius, it ended abruptly, or temporarily suspended because the Franco-Prussian War broke out and the bishops in attendance wanted to return to their diocese. After Rome was captured, Pope Pius permanently suspended the Council but did not close it officially. Pope John died during the intermission break between the first and second session of the Second Council to which it was suspended. Once Cardinal Giovanni Montini was elected as Pope Paul VI, he reconvened the Second Council and presided over it until its ending in 1965.
October 11, 1962.
There were exactly no doctrines defined at the Second Vatican Council. The Second Vatican Council was the first purely pastoral council ever held in the Church.
The Second Vatican Council said nothing about beverages in Church.
Yes, it was an ecumenical council.
The Second Vatican Council was an Ecumenical Council called by Blessed Pope John XXIII to "update" the Church in relating to the modern world.
The role of the First Vatican Council was an ecumenical Council that defined Papal infallibility and several other doctrinal issues. The role of the Second Vatican Council was purely pastoral.