The prevailing theory about the creation of our universe is that there existed a singularity, an Alpha point of zero, in which condensed energy reached such a state of heat it “exploded”. That explosion (which current theory considers less an explosion than a cooling and expansion) eventually evolved into the universe as we know it, today. In the sense that I understand time, this is where time begins.
Except that it isn’t. The fault is not in the definition, itself, the fault is in my perception of where the true (as opposed to science’s alpha) zero point begins.