Nope, but nice try. Because the Bible teaches that God respects our will and neither damns nor rewards those who do not, through the grace of His Son, accept and believe in His Son, we believe He covers and protects the little ones until they make that decision of the will.
And, no, no man knows the hour or the day, but the problem with the Calvinist construct is that if God does not regard our choice of Christ (because He has -- according to that flawed construct -- already individually predestined the majority to Hell without any opportunity for salvation, then why would it trouble Him that a few little ones would go to Hell -- since their adult decision for Christ would be meaningless in any event?
How much farther from the Bible and the Love of Christ could that foolish construct be?
And those who die before they make that Decision of Will?
Are they "covered and protected" by... God's Irresistible and Unilateral decision to save them, despite the lack of any "decision of will" on their parts to "accept" salvation?
So God unilaterally and irresistibly wills to regenerate -- to "born-again" -- some who have made no "decision of will" to accept being born again?