According to the special relativity, time dilates for an observed body which travels through space relative to an observer. This paper has extended the concept of time dilation that leads us to an unanticipated conclusion. The current research work concludes that when one extends the time dilation then there is a timeline interchange for the object that is in motion. It simply means that an observed body because of its motion travels into the past of the observer’s timeline because the rate of flow of time for the observed body has been dilated relative to the observer’s rate of flow of time. It should be noted that the observed body has not traveled to its past (as the rate of flow of time is only dilated not reversed). This means that the past interpreted by the observer would not be the past of that observed body but the present of the observed body. It can be seen here that the Einstein’s now concept (which is a theoretical prediction of special relativity) which says that an observed body’s now(present) may not be same for an observer’s now(present), it may be past or future depending upon the direction of motion of the observed body relative to the observer’s frame is a direct consequence of the timeline interchange because of the time dilation (this will also be true when the frame of reference interchanged i.e. the observer is moving relative to the observed body in that case the observer will travel into observed past provided that there Is no common reality of who is moving in the cases of motion with constant velocity). This concludes that the timeline interchange can justify the reason for Einstein’s now concept and help us to progress in understanding the true nature of time.