What is time? Some understand time loosely and intuitive and give up at superficial explanations. Time together with space create all we know today. Space-time started with the Big Bang, and scientists say it will never end. Time is relative and it is influenced on Earth through time zone, which depends on location, and in the Universe through gravitational field. On a planet with greater gravity time goes slower. Let’s imagine: There are two twins, one of them travels on a planet with much greater gravitational field, when he comes back, the twin on Earth will be much older then the twin who traveled in space.
Did you notice that time seems to go faster than years ago? This is also because of the gravitational influence. The Moon is moving away from Earth 4 cm every year, which influences the time on Earth.