I know that God Almighty is able to do all thing and I made dua to God to reverse time back till the moment He created the Pen and to change and add many things including life etc.
I told this my mother and she said: "Stop right there. Not even in millions and trillions years in future God will reverse time back for anyone. Even if He did, He did with a purpose to show the people that He is able to do all things and that's it. And if one makes dua to Him, then He'll not reverse the time back."
How can I explain to my Christian mother that one does not know Allah's decision?