Is there a concept of time in the world to come, or is there no measure of it?

In the world to come, there is a concept of time, and because of this, we still relate to the birthday of a righteous person even after his or her passing.

The source for this can be found in the writings of the Previous Lubavitcher Rebbe, the Rebbe “Rayatz” (Yosef Yitzchak) from the 20th of the month of Cheshvan 5705, when he wrote that his father told him, “in these twenty-four hours that close eighty-four years since my soul came down to the lower worlds, I will receive good visitors, for each one of the holy Rebbes, our ancestors, will come before me and deliver an exposition on one of the sentences in chapter 84 of the Psalms.”

From this we can derive that there is a concept of time in the world to come, in direct succession to a person’s life in this world, his years being counted from the time he/she came down to this world.