It were Shanip Prodhoshams in Aug 2010 and Somavara Pradoshams in Sep 2010
Two Pradoshams came in August 2010. Both earned the reputation of being Shanip Pradosham. Now this month we do have two Pradoshams. One which is closer to us is Sep 20. That is Somavara Pradosham.
You can check out the greatness of Pradoshams and Pradosha Vrathams from the Wiki page here.