http://www.ncregister.com/daily-news/conclave-expected-to-begin-between-march-9-11/

Conclave likely to begin between 9 March 2013 and 11 March 2013 according to a Vatican official. Based on the Motu Proprio Normas Nonnullas released by Pope Benedict XVI to clarify and modify the rules of the Conclave as stated in the Apostolic Constitution Universi Dominici Gregis, the Conclave can begin earlier than 15 days after sede vacante began.

However, the decision on the date of the beginning of the Conclave rests entirely on the College of Cardinals, who will decide in the General Congregation of Cardinals and other meetings that will begin today, Friday, 1 March 2013.