There's difference btw set time and appointed time,talking about predestination it's Gods appointed time for us ,its spiritually destiny ordained by God for men before men were form,when we seek his help it comes with a bundle of fulfillment,the 99% perfection in life.Choice is the decision we make without spiritual guidance,we take decision because of our selfish interest & desires (carnally minded) but about choice is a decision one make right/wrong,in all we need to seek God grace,guidance and intervention ,nomatter the circumstances we find ourselves.