Birthdays
Part I: The Pagan View
From The Fire, Katherine Neville's sequel to her novel The Eight:
"'Cat…. realized that we all need some kind of a chariot driver to pull our forces together, like those horses of Socrates, one pulling toward heaven, one toward the earth….'
… I asked, 'Is that why you said my mother's and my birthdays are important? Because April 4 and October 4 are opposite in the calendar?'
Rodo beamed a smile…. He said, 'That's how the process takes place….'"
Part II: The Christian View
"The Calendar of saints is a traditional Christian method of organizing a liturgical year by associating each day with one or more saints and referring to the day as that saint's feast day. The system arose from the very early Christian custom of annual commemoration of martyrs on the dates of their deaths, or birth into heaven, and is thus referred to in Latin as dies natalis ('day of birth')." –Wikipedia
The October 4 date above, the birthday of Cat's daughter, Xie, in The Fire, is also the liturgical Feast of St. Francis of Assisi (said by some to be also the date of his death).
The April 4 date above is Neville's birthday and that of her alter ego Cat in The Eight and The Fire. Neville states that this is also the birth date of Charlemagne. It is, as well, the dies natalis (in the "birth into heaven" sense), of Dr. Martin Luther King.
For more about April 4, see Art Wars and 4/4/07.
For more about October 4, see "Revelation Game Continued: Short Story."