SAY WHAT??????
Okay, lol, let me try to clarify. God has always existed. Right? So, whenever He did something, anything, is the point at which we can then measure time.
"-" <---- represents eternity, okay? "_" <------ this represents an action or point in eternity that occurred. The arrows at each end will represent going on forever, no beginning and no end.
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So, what we can gather from this is that time can only be measured at the moment ( "_") something occurs, and prior to that moment time couldn't be told or measured.
Now, when we take that "occurrence" or "moment" and wait for another, we then can tell time, based upon measurement.
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At least, to me, that seems logical. That time can only work with a reference point (in our case, a beginning), but in eternity as a moment taking place and then from there onward.
Its kind of weird to think of, because God has always existed with no beginning and no end, He is eternal, so does that mean He doesn't have a first action, thought, creation, or moment that can be measured? At the very least, from an eternal stand point, God could measure how long it has been since He created the world from eternity, or use any, again, moment that took place and then start counting (such as Heaven, angels, etc).