http://www.news.va/en/news/conclave-to-begin-tuesday-march-12th

The College of Cardinals have voted on the starting date of the conclave, and had decided in the Eighth General Congregation of the College of Cardinals, which takes place on Friday evening 8 March 2013, that the Conclave will begin on Tuesday, 12 March 2013 in the afternoon.

The Mass for the Election of the Roman Ponfiff or the Missa pro Eligendo Pontifice will be celebrated at St. Peter’s Basilica on Tuesday morning, 12 March 2013.

Let us pray for the Cardinal-electors going into the Conclave, that God will guide them through the Holy Spirit to make a careful and well-discerned choice to elect our new Pope, to be the shepherd of the Universal Church.