The rate at which we move through
time (comparing t to t' the time of two observers
in different reference frames)
is a function of the speed
*
with which we move through space,
this is the essence of
special relativity.
ct' = gt(c - v)
g = {1 - (v*v/c*c)}^{-1/2}
now usually v the
velocity
we travel at is much smaller than c the
speed
of light and so there is little distinction
between t and t'. As v approaches c
things get messy and for one person
time stops.
If you think time does not exist then
you might have some problem explaining this.
* the relative velocity of the
the two
observers where they are both
in a
locally inertial frame of reference.
To be more general requires, well,
general
relativity.