The ritual opening of the Holy Door of Mercy in the Basilica of St. Peter, December 8, 2015, marked the official start of the Jubilee of Mercy. From that moment, in every Catholic Church in every diocese, the faithful are called to celebrate and live the Jubilee, particularly through the liturgy. "Celebrating Mercy" is the definitive guidebook for all diocesan and religious communities, parishes, and shrines, filled with useful recommendations for celebrating the Jubilee, including the official Rite of the Opening of the Door of Mercy in Local Churches. Paperback. 88 pages.