First Thursdays Devotion
The First Thursdays Devotion, also called the Act of Reparation to the Wounds of Jesus and to the Holy Eucharist, is a Catholic devotion to offer acts of reparation. Oratio Sancti Caietani
There was already at this time a long-standing first Thursdays devotion that involved praying the Respice, Domine ("Look down, O Lord"), a prayer attributed to Saint Cajetan. The prayer was to be said while kneeling before the Blessed Sacrament. A plenary indulgence was granted for the first Thursday in each month to all who would say it after confession and communion and pray for the needs of the Church. Partial indulgences were granted for saying the prayer at other times. Cajetan's prayer echoes Psalm 120, and was popular as a plea for help and protection in times of trouble. Margaret Mary Alacoque
Eucharistic adoration during a "Holy hour" on Thursdays was part of the revelations reported by Margaret Mary Alacoque. Pope Pius VI granted a plenary indulgence for those who would visit the Blessed Sacrament on the first Thursday of the month. Picpus Father Mateo Crawley-Boevey (1875-1960) promoted an at-home Holy Hour for those who couldn't make it to an oratory or chapel. Alexandrina of Balazar

According to the Portuguese mystic Alexandrina Maria da Costa, popularly known as Blessed Alexandrina of Balazar, she experienced an apparition of Jesus on 25 February 1949, during which he requested a new devotion in reparation for his Holy Wounds, to be practiced on the first Thursday of six consecutive months. The number six represents Jesus' five wounds of the Crucifixion (hands, feet, and side) plus his shoulder wound from carrying the cross. On these days, a person is to attend the Mass and receive the Eucharist in a state of grace "with sincere humility, fervor and love" and spend one hour before a church tabernacle containing the Eucharist, meditating on the wounds of Jesus (particularly his shoulder wound) and the sorrows of Mary. This devotion to the Holy Wounds through Eucharistic adoration was approved by the Roman Catholic Church. The Salvatorians initiated a First Thursday devotion for sanctification of the priesthood. See also
 Shoulder wound of Jesus
 Seven Sorrows of Mary

Notes

References

Further reading
 MADIGAN, Leo; Blessed Alexandrina da Costa: The Mystical Martyr of Fatima. Fatima-Ophel Books, Fátima, Portugal (2005). JOHNSTON, Francis W.; Alexandrina: The Agony and the Glory. Saint Benedict Press, TAN Books (2009). ROWLES, Kevin. Blessed Alexandrina - Living Miracle of the Eucharist. Twickenham, United Kingdom (2006)

Catholic devotions