This is the formula to determine your Ming Gua:
Add the digits of the birth year, ending with a single digit.
Example: 1964 = 1 + 9 + 6 + 4 = 20 = 2 + 0 = 2
Male: Subtract that digit from 11
11 - 2 = 9
Female: Add 4 to that digit
2 + 4 = 6
Should the Life Gua (Ming Gua) add up to 5, then for a male,
convert 5 to 2; for a female, convert 5 to 8.
5 is considered to be the Evil Emperor and is to be avoided.
Since the Chinese year begins on February 4, if you were born on January 31 of 1964, you would consider yourself to have been born in 1963.
The elements are as follows:
1 Water 2 Earth 3 Wood 4 Wood
5 Earth (but not used for Ming Gua)
6 Metal 7 Metal 8 Earth (benevolent) 9 Fire
These numbers are the stars in the Flying Stars; each has its own character. Currently, we are in Period 8 which is a benevolent Earth element. Stability, family values, prosperity to those who really know what they are doing, etc., in this next twenty years.
These numbers can be used to differentiate between East and West people, but the Flying Stars are more accurate.