# Does time have a minimum 'speed'?

Sorry if this is an ignorant question, but I've been having some trouble grasping some concepts related to time dilation. So far, my understanding of the concept says that if I am in a certain frame of reference, and another frame of reference is moving at let's say 0.99c, there is a very evident effect of time dilation where time passes much slower in frame 2 compared to frame 1. And we have observed relativistic effects in satellites etc. because of their higher speed of motion with respect to Earth.

If I move away from the gravitational effects of Earth, and am able to observe Earth spin away from me, the same theory would hold for a clock sitting on Earth versus the clock in my hand. But if I move away from every possible cause of motion (galaxies moving from expansion etc.), and am absolutely still in space: what would happen to the clock in my hand? The whole thought behind relativity is the idea of nothing being absolute, so that being the case, to what extent can I 'decelerate' time in my frame?

• Time always has the same "speed", that which the local clock shows. That's just not the same as that which a remote, moving clock shows. Feb 1, 2016 at 0:36
• By "speed" of a physical variable $x$, we mean the time derivative of $x$, so the speed of time is always 1. Feb 1, 2016 at 2:08
• There is no such thing as being "absolutely still in space". Feb 1, 2016 at 2:15