Book of Common Prayer (page 243)

The Transfiguration August 6

O God, who on the holy mount revealed to chosen witnesses
your well-beloved Son, wonderfully transfigured, in raiment
white and glistening: Mercifully grant that we, being
delivered from the disquietude of this world, may by faith
behold the King in his beauty; who with you, O Father, and
you, O Holy Spirit, lives and reigns, one God, for ever and
ever. Amen.

Preface of the Epiphany

Saint Mary the Virgin August 15

O God, you have taken to yourself the blessed Virgin Mary,
mother of your incarnate Son: Grant that we, who have been
redeemed by his blood, may share with her the glory of your
eternal kingdom; through Jesus Christ our Lord, who lives
and reigns with you, in the unity of the Holy Spirit, one God,
now and for ever. Amen.

Preface of the Incarnation

Saint Bartholomew August 24

Almighty and everlasting God, who gave to your apostle
Bartholomew grace and truly to believe and to preach your
Word: Grant that your Church may love what he believed
and preach what he taught; through Jesus Christ our Lord,
who lives and reigns with you and the Holy Spirit, one God,
for ever and ever. Amen.

Preface of the Apostles