The Feast of the Guardian Angels is October 2nd.

PRAYER TO MY GUARDIAN ANGEL.
Angel of God’s light, whom God sends as a companion for me on earth, protect me from the snares of the devil, and help me to walk always as a child of God, my Creator.
Angel of God’s truth, whose perfect knowledge serves what is true, protect me from deceits and temptations. Help me to know the truth, and always to live the truth.
Angel of God’s love, who praises Jesus Christ, the only Son of God, who sacrificed His life for love of us, sustain me as I learn the ways of Divine love, of sacrificial generosity, of meekness and lowliness of heart.
Thank You, my heavenly friend, for your watchfull care. At the moment of my death, bring me to heaven, where the one true God, Who is light, Truth and Love, lives and reigns forever and ever.
Amen.