The same phenomenon happens while we are physically alive in a 3rd dimension body on the 3rd dimension Earth, and our energy vibration increases, and we ascend to 5th dimension consciousness. Our perception of time slows down.
When a person reaches 5th dimension consciousness, they only live in the present moment with no reference to the past. They can access past memories if they need to, however, a person who has reached 5th dimension consciousness does not dwell in the past. Their mind is automatically focused on the present moment with no effort required on their part at all whatsoever. It is simply a state of being that they automatically live in.