The World Day of Prayer for the Sanctification of Priests takes place every year on the Solemnity of the Most Sacred Heart of Jesus. This year the Solemnity is on Friday, June 11, 2021.The World Day of Prayer for the Sanctification of Priests was established by Pope St. John Paul II in 2002 and encourages priests to reflect upon the importance and dignity of their vocation."Most Sacred Heart of Jesus, have mercy on us."