Feast of the Guardian Angels:
Here's a nice Guardian Angel prayer I found at the Catholic Doors site:
My good Angel,
Thou comest from heaven;
God has sent thee to take care of me.
Oh, shelter me under thy wings.
Lighten my path, direct my steps.
Do not leave me,
stay quite near me
and defend me against the spirit of evil.
But above all come to my help
in the last struggle of my life.
Deliver my soul so that with thee it may praise,
love and contemplate the goodness of God
forever and ever