The past is not gone, and the future is not something we can shape. Everything that has happened or will happened exists. From the signing to the declaration of independence. Or the first human landing on Mars. The distinction of the past, present, and future is an illusion. Einstein has shown 100 years ago that space and time are one entity and we are simply riding the wave of space-time.
If you would like to learn more about time and space, please take the course at worldscienceu.com. Brian Greene does a wonderful job simplifying these complex subjects. You can take a math based course, or a non math based course. But by taking either one, your perceptive about the world will change.
Here is another video where he describes the gravitational wave discovery: