Aeviternity

There [in the new heaven] shall we, indissolubly, with all the choir of heaven pass our eviternity of bliss, in lauding and praising the incomprehensibly-glorious Majesty of our Creator, Redeemer, Sanctifier; in perpetual Hallelujahs to him that sits upon the throne.

Source: wiktionary

Further, if there is no before and after in æviternity, it follows that in æviternal things there is no difference between being, having been, or going to be. Since then it is impossible for æviternal things not to have been, it follows that it is impossible for them not to be in the future, which is false, since God can reduce them to nothing.

Source: wiktionary

At the end of the world after the last judgment, time will cease and we will live like the angels in a state of aeviternity.

Source: wiktionary

"Aeviternity," the old man said in a matter-of-fact way, shrugging his shoulders. "You were in aeviternity." Seeing Jonah's puzzled look and knowing that his charge was not one to rest without the answers he sought, he continued, “… the realm of the angels and saints. What most people mean when they say eternity is actually aeviternity. You see, eternity is unchanging, without beginning or end. Only God is truly eternal.

Source: wiktionary