"A “yod” is an aspect pattern that some astrologers use.  It involves two planets in a close sextile (60°), with a third planet ‘quincunx’ (150°) to both of the planets in sextile. 
The truth about yods is that they aren’t terribly important, or at least not as much as they are made out to be by some people.

"Trying to understand and write about this ongoing t square is difficult given all of its astrological complexity, but in a nutshell, this cardinal t square seeks to instill radical, total and complete change in our lives (more intensely so if you have planets at the early cardinal signs: 0-3 degrees Libra, Capricorn, Cancer, Aries) It asks that we purge our old ways of doing things...business as usual dies. It wants us to build new structures in our lives, based on higher spiritual truths.

"21st of December 2012… the date when all things will change. Hmm.. at least this is the story sold today. This post is not to discuss about the importance of this event but to analyze some astrological facts related to.

On December 2012 a Yod configuration (Finger of God) will be formed having Jupiter as focal point and Saturn and Pluto as supporting planets. An Yod is a configuration where two planets are 150 degrees apart from a third one and between them there are 60 degrees.

"This article is about a powerfull and quite unique astrological configuration: T-Square based on Mars-Pluto opposition and Saturn squaring to both. Do you know how often this configuration occured/will occurr in 1900-2036 time interval?"
"This T-Square was active during all 1929 summer period due to the Mars retrograde period. Actually the perfect configuration was with Mars retrograde. On top of this Mars,Saturn and Pluto were positioned at 0 degrees!!! Mars in Aquarius, Saturn in Taurus and Pluto in Leo.  "

"Over the years I've been asked many times what is a "Yod," or "Finger of God?" Today we do a brief review of what it is and how it works.
A Yod, or Finger of God, is a configuration consisting of two planets in sextile with a third at their inverse midpoint, creating two quincunxes to the planets in sextile. A sextile is a 60 degree angle showing productivity and a natural structural soundness. Think snowflakes, or hexagonal crystal structures in nature."

An article discussing the cardinal grand cross alignment of late May 2010 along with the Sagittarius Full Moon and Mars/Neptune opposition.  Interestingly the Lost TV series final season enters its culmination at this time and the 2 events are linked - your own 'Dharma Initiative'.
 

So, from the four faced cherubim in both Old and New Testament Prophecies, the Royal Stars of Persia, the Celtic Sabbats, to The Wheel of Fortune in the Tarot –Myriad ancient Symbols point to the Power of the Fixed Cross in the Tropical Zodiac and suggest a connection with the power of prophecy.

“This small triangular pattern both looks and acts like a tiny radar dish. It is highly sensitive to picking up and storing all manner of information from the surrounding environment. It gathers this in, working most of the time on auto-pilot, stashing it away for future use as and when the occasion demands. . . . The Ear/Eye works effectively as an information gatherer. The green semi-sextiles continuously absorb facts, clues, hints, words, visual impressions and anything else of interest from the surroundings.

"You have a T-Cross (also called the T-Square) when two planets that make an opposition aspect (180 degrees) are both making a square aspect (90 degrees) to some third planet. Draw lines connecting all three and you have a T. 

"Marc Edmund Jones defined the Splay chart as having the planets lumped in three distinct groups. Since the groups could be anywhere on the wheel, Splay people are usually unique in some way, difficult to pigeonhole. I’ve found, however, that the same effect can occur if the planets are bunched in four or even five groups. The groups have to be at least sixty degrees apart unless they are separated by the Ascendant-Descendant line or the Mid-Heaven-Nadir line."