"We prescribe that during the whole month of October, at the recitation of the Rosary, for which We have already legislated, a prayer to St. Joseph be added, the formula of which will be sent with this letter, and that this custom should be repeated every year."QUAMQUAM PLURIESENCYCLICAL OF POPE LEO XIIION DEVOTION TO ST. JOSEPHhttp://w2.vatican.va/content/leo-xiii/en/encyclicals/documents/hf_l-xiii_enc_15081889_quamquam-pluries.html
Please join me in prayer during the month of October by adding this prayer to the end of your rosary:Prayer to Saint Joseph
To thee, O blessed Joseph, we have recourse in our affliction, and having implored the help of thy thrice holy Spouse, we now, with hearts filled with confidence, earnestly beg thee also to take us under thy protection. By that charity wherewith thou wert united to the Immaculate Virgin Mother of God, and by that fatherly love with which thou didst cherish the Child Jesus, we beseech thee and we humbly pray that thou wilt look down with gracious eye upon that inheritance which Jesus Christ purchased by His blood, and wilt succor us in our need by thy power and strength.
Defend, O most watchful guardian of the Holy Family, the chosen off-spring of Jesus Christ. Keep from us, O most loving Father, all blight of error and corruption. Aid us from on high, most valiant defender, in this conflict with the powers of darkness. And even as of old thou didst rescue the Child Jesus from the peril of His life, so now defend God's Holy Church from the snares of the enemy and from all adversity. Shield us ever under thy patronage, that, following thine example and strengthened by thy help, we may live a holy life, die a happy death, and attain to everlasting bliss in Heaven. Amen.#saintjoseph