Any change requires Time to elapse, or else the change becomes an absurdity. If God conjured the moment to create Time, two phases exist, one where Time is yet to be created, and another where Time has already been created. Now both phases cannot exist simultaneously as that would bring about an absurdity, but the only thing that can prevent this simultaneity is Time itself, which is yet to be created during the change in the phases. This brings back the logical necessity of Time to allow any change.
While you are thinking about this, also consider the problem of Infinite Regress - for God to conjure a moment to do something, in a Timeless realm, what could the reference moment be to begin the conjured moment? If the past is infinitely endless, how can the present be arrived at?
You're thinking about this incorrectly. Like the person who says that distance of an arrow shot as a function of time d(t) such that each successive value of t the distance halves means that the arrow will never cover the entire distance. This is absurd [in life] because you can fire a bow and the arrow will cover that distance in some finite (and short) period of time.