Birthday Number
The day of the month on which you were born, reduced to a single digit — a secondary core number describing a specific gift or talent you bring to your life path.
The Birthday Number is the simplest core number to calculate: it is simply the day of birth, reduced to a single digit (or kept as a master number if it is 11 or 22).
Where the Life Path describes the overall road and the Destiny describes your gifts in full, the Birthday Number describes a specific gift or talent — a sub-theme of the Life Path that has particular relevance.
Some practitioners treat it as a "gift" number: the particular quality that arrived with you on the day of birth as a specific resource for the journey. A birthday on the 15th (reduces to 6) suggests a gift for nurturing and beauty; a birthday on the 22nd (master number) suggests a gift for building at scale.
How to calculate
Simply take the day of your birth and reduce to a single digit. Day 1–9: keep as is. Day 10: 1+0=1. Day 11: master number, keep as 11. Day 22: master number, keep as 22. All others: add digits and reduce.
See also
Related terms
Life Path Number
The most important number in your numerological chart — calculated from your full birth da…
Destiny Number
Also called the Expression Number — calculated from the full birth name and describing you…
Numerology Chart
The complete set of core numerological numbers for a person — typically including Life Pat…
All glossary terms