The number 3 stands in symbolism for the Planet Jupiter, a Planet which plays a most important role both in Astrology and in all systems of Numerology. It is the beginning of what may be termed one of the main lines of force that runs right through all the numbers from 3 to 9.
It has a special relation to every third in the series, such as 3, 6, 9, and all their additions. These numbers added together in any direction produce a 9 as their final digit, and the 3, 6, 9 people are all sympathetic to one another.
Persons having a 3 for their Birth number are all those who are born on the 3rd, 12th, 21st, or 30th in any month, but the number 3 has still more significance if they should be born in what is called the" period of the 3," from the 19th February to March 20th-27th, or from the 21st November to December 20th-27th.