Don’t know, but there is a lot of significance with the number 3 in many things http://en.wikipedia.org/wiki/3_(number)#In_religion_and_mythology
The spiritual significance of the number three denotes completeness, as three lines complete a plane figure. Hence, three is significant of Divine perfection and completeness. The third day completes the fundamentals of creation-work. The fourth, fifth, and sixth days are the counterpart and repetition of the first, second, and third, and correspond respectively. The number, three, includes resurrection also; for on the third day the earth rose up out of the deep, and fruit rose up out of the earth.
Eliphas levii though that Three was the perfect number- i can’t remember why, but it had something to do with one being loneliness or omniscience or something, two being division, and three being the first number of mutual agreement… or something.
1 represents a point; it has significance of its own, but 2 has more because it defines a line. Therefore 3 is still more significant since it defines a plane. With one you get unity; with two, duality; with three, structure.
You’d benefit from a basic text in the Kabbalah.
If you ask this question there are many others also that must be asked like Why did Satan create a pagan feast on December 25th(Saturnalia) on Christ’s conception day(Luke 1:5), Why did Satan put a pagan feast on High Passover(Ishtar{Easter}) when Christ was crucified, and the answer to all of these questions is simply….. To mock the one true God(“Abuja” Luke 1:5 Abba=Papa Jag=part of God’s true name a.k.a. HalleluJAH, Cubika, etc.) it is one of his sole passions until Christ returns and if any of these deceptions leads believers astray it is a bonus for him, so don’t let him steal your Holy Days a.k.a. Holidays or the holiness of the number three.