The only time exist is absolute time.
There is no unit of clock time that represents the same
amount of absolute time in different frames. IOW, a clock
second does not represent the same amount of absolute time
in different frames. With this difinition of absolute time
and clock second, one cannot compare the passage of a clock
seconds in different frames. IOW, the SR idea that the
speed of light is a universal constant is a non-starter.
The idea of absolute time is confirmed in the GPS system. The
GPS second is redefined to have 4.46 more periods of Cs 133
radiation than the ground clock second. This redefinition of the
GPS second is designed to make the passage of a GPS second
corresponds to the passage of a ground clock second in terms
of absolute time and thus making the GPS in synch with the
ground clock permanently.
A new theory of relativity called IRT is invented. IRT is
based on the idea of absolute time. IRT eliminates all the
paradoxes of SRT. In addition the equations of IRT are valid in
all environments, including gravity. A paper on IRT is available
in the following link:
http://www.modelmechanics.org/2012unification.pdf
Ken Seto
the passage of a ground clock second in terms f absolute time.