For the faithful, a plenary indulgence can be obtained on the opening and closing days of the Year for Priests, on the 150th anniversary of the death of St. Jean-Marie Vianney, on the first Thursday of the month, or on any other day established by the ordinaries of particular places for the good of the faithful.
To obtain the indulgence the faithful must attend Mass in an oratory or Church and offer prayers to "Jesus Christ, supreme and eternal Priest, for the priests of the Church, or perform any good work to sanctify and mould them to his heart."
The conditions for the faithful for earning a plenary indulgence are to have gone to confession and prayed for the intentions of the Pope.
In honor of today being the World Day of Prayer for Priests, please see the following past posts related to today.
Prayer for Priestly Vocations:
O Lord, God of power and majesty, you said that the harvest is great but the laborers are few. Send forth, we beseech thee, laborers into your vineyard to forgive sins, celebrate the Eucharist, baptize, and above all make us a people worthy of thee. We ask this through Jesus Christ, Our Lord.
Image Source 1: Unknown
Image Source 2: Believed to be in the Public Domain, Priests from 1932