Correction: God was not a trinity, until He became one. Time and space are coordinates that measure the persistance of existance. The concept of trinity requires the incarnation to have been at least contemplated and decided by God. In order for that to happen time must pass and the dynamical events of thought decision and action must occur along a time line. Time in this world is not the same as in God's world. There is no known transformation eq. that can be used to know His time. It is simple enough to know that God was not incarnate and a trinity infinitely long ago. God was the person of the Holy Spirit infinitely long ago.
Why? The Catholic "concept" of the Trinity does *not* require the incarnation.
-A8
Have a nice life, sir