The Holy Father, Pope Benedict XVI, yesterday announced:
I would like to announce in this Eucharistic celebration I have decided to convene a ‘Year of Faith’, which I will explain in an apostolic letter. This ‘Year of Faith’ begins on October 11, 2012, on the 50th anniversary of the beginning of Vatican II, and ends on November 24, 2013, for the Solemnity of Christ, the King of the Universe. It will be a moment of grace and commitment to a more complete conversion to God, to strengthen our faith in Him and to proclaim Him with joy to the people of our time.
Here's the promised letter.