Step by step: from birth date to birth cards
- Split the date into month, day, two-digit century, and two-digit year.
- Add those four values.
- For a three-digit total, add the leading two-digit number to the final digit: 126 becomes 12 + 6 = 18.
- If the result is above 21, add its individual digits until it is 21 or lower.
- Map 10–18 to that number and the number minus 9; map 19 to 19/10/1; map 20 to 20/2; and map 21 to 21/3.
- For a final 1–9, pair the number with itself plus 9. This method does not add the Fool as 22.
Example: 1987-06-14 becomes 6 + 14 + 19 + 87 = 126, then 12 + 6 = 18. The pair is The Moon (18) and The Hermit (9).
A total of 19 returns three cards. Example: 1990-01-08 becomes 1 + 8 + 19 + 90 = 118, then 11 + 8 = 19. The cards are The Sun (19),
Wheel of Fortune (10), and The Magician (1).
Compare any result with the complete 78-card meaning library; the calculator
links directly to each card it returns.