Only three birthdays are celebrated in the Catholic Church.  We celebrate the birth of Christ around the time of the winter solstice, after which the days increase in length in the regions of early Christendom.  John the Baptist was born around the time of the summer solstice, after which the days decrease.  This reminds us of the words of the last of Christ's prophets:

"He must increase, but I must decrease."  John 3:30

John the Baptist is usually depicted as pointing, because he points towards Christ, as in this Titian masterpiece:

Titian. St. John the Baptist. c.1540. Oil on canvas. Gallerie dell' Accademia, Venice, Italy

Let this be true of us all.