The past is fixed and clear.
It is impossible to revive the time that has gone into the past.
The future is subject to the Heisenberg uncertainty principle: ΔE Δt ≈ ħ/4π.
"Time" is created by gravity matter and energy (quantum energy).
"Time" is a relative concept.
Without gravity and quantum energy the universe has no time.
It is eternal (and infinite).