Today is the feast of the birth of St John the Baptist. You can read about it in the first chapter of Luke's gospel.
Almighty God and Father,
you sent Saint John the Baptist to the people of Israel
to make them ready for Christ the Lord.
Give us the grace of joy in the Spirit,
and guide the hearts of all the faithful
in the way of salvation and peace.
Through our Lord Jesus Christ, your Son,
who lives and reigns with you and the Holy Spirit,
one God, for ever and ever.