Thomas Aquinas,
Summa Theologiae — Question 77 - OF THE TIME AND MANNER OF THE RESURRECTION…
“ Therefore we can also know exactly the time wherein the state of the New Testament will endure. But the state of the New Testament will last to the end of the world, wherefore it is said (Mat. 28:20) : "Behold I am with you . . . to the consummation of the world." Therefore the time of the end of the world and of the resurrection can be known exactly.On the contrary, That which is unknown to the angels will be much more unknown to men: because those things to which men attain by natural reason are much more clearly and certainly known to the angels by their natural knowledge. ”
