The Soulborn Engine uses a form of astrology to determine the types of conflicts your character will encounter as they roam about the world. At that precise moment your character is born, each celestial body holds some position in the heavens - their gravitational force pulling you in different directions. Like a map of the future, the position of each planet charts a course that dictates the theme of your character’s life and the types of obstacles you’ll face. When your character finally grows old and dies, the passing of time will necessitate a new birthdate, and with it a whole new set of adventures.  There is a random hour component (that the player doesn't see) so that even if people choose the same day they won't have the same natal chart.
The position of the planets in relation to the Houses of the Zodiac will have an effect on your destiny.