The Novena to the Guardian Angel begins on September 23 and ends on October 1, the eve of the Feast of the Guardian Angels. (I’ve kept the archaic language here because I actually prefer it. I hope you do, too.)
O holy angel, whom God, by the effect of His goodness and His tender regard for my welfare, has charged with the care of my conduct, and who assists me in all my wants and comforts me in all my afflictions, who supports me when I am discouraged and continually obtains for me new favors. I return thee profound thanks, and I earnestly beseech thee, O most amiable protector, to continue thy charitable care and defense of me against the malignant attacks of all my enemies. Keep me away from all occasions of sin.
Obtain for me the grace of listening attentively to thy holy inspirations and of faithfully putting them into practice. In particular, I implore thee to obtain for me the favor which I ask for by this novena.
(Here mention your intention or prayer request.)
Protect me in all the temptations and trials of this life, but more especially at the hour of my death, and do not leave me until thou hast conducted me into the presence of my Creator in the mansions of everlasting happiness.
Our Father, Hail Mary, Glory Be.
Image: Guardian Angel, by Carlo Dolci, Wikimedia Commons, public domain.