Birth date Numerology utilizes the numbers of the birth date to provide information about an individuals life purpose, purpose path, life path, soul number, gift numbers, core number, foundation number, destiny number, purpose number, projections, karmic number, lesson number, personal year and master cycles.
Many systems focus on the purpose (or destiny) number, soul number and lesson (or karmic) number. More robust systems add more information by adding the birthdate numbers in unique combinations.
Birth date number systems vary. Pythagorean Numerology utilizes the pythagorean theorem (A squared + B squared = C squared) to provide a 81 year birthdate numerology chart (check out Numerology and the Divine Triangle). Kabbalistic numerology uses the birthdate month, day and time to reveal information about the person. Practical Numerology: A Tool For Simplified, Integrated, & Creative Living utilizes a simple chart with unique number combinations to provide information about the persons greatest strengths and hidden weakness.
The birthdate numerology uses metaphors, symbolism, and meaning to derive information about different aspects of an individuals personality or life purpose. The value and practicality of the information is dependent on the system utilized and the individuals understanding of the system.