Thus it is shown that the proper time equation incorporates the time dilation effect. In fact, for an object in a SR (special relativity) spacetime traveling with velocity v for a time Δ Δ T , the proper time interval experienced is Δ Δ τ τ = Δ Δ T 2 − − ( v x Δ Δ T c ) 2 − − ( v y Δ Δ T c ) 2 − − ( v z Δ Δ T c ) 2 = Δ Δ T 1 − − v 2 c 2 , which is the SR time dilation formula.