Blessed Pope John XXIII, three months into his pontificate, had already made his intentions known.
On this day, fifty years ago, he made it official.
The Apostolic Constitution Humanae Salutis, issued December 25, 1961 formally summoned the next ecumenical council, to be held in Vatican City beginning some time next year.
Quite the Christmas present to the Church.
Half a century later, we are still unwrapping it.