On Wednesday, January 2, 2019 at 8:46:30 AM UTC, Paul Schlyter wrote:
On Tue, 01 Jan 2019 07:52:37 -0700, Chris L Peterson
wrote:
On Tue, 01 Jan 2019 09:17:39 +0100, Paul Schlyter
wrote:

On Mon, 31 Dec 2018 09:28:28 -0700, Chris L Peterson
wrote:
But we must be inside the 4D sphere or else we would have no
future.

No, we are on the surface. The surface is "now". The center is
t=0
(actually, it is (0,0,0,0), the location of the Big Bang). The
past
is
inside the sphere, where it is not accessible to us.

Which means that in one second we will be almost one lunar
distance
outside this sphere? Since outside the sphere is where the future
is.

In one second the surface of the sphere will have moved outward by
one
second, placing everything in the Universe one second later.

As you probably know from relativity time isn't an absolute quantity.

The evolution of timekeeping to represent 'time', at least among mathematicians, is one of those stories which is hard to beat.

The 24 hour system with its equable hours, minutes and seconds is an outrigger of the calendar framework and the system of references and planetary cycles which make that system possible.

"Absolute time, in astronomy, is distinguished from relative, by the equation of time. For the natural days are truly unequal, though they are commonly considered as equal and used for a measure of time; astronomers correct this inequality for their more accurate deducing of the celestial motions...The necessity of which equation, for determining the times of a phænomenon, is evinced as well from the experiments of the pendulum clock, as by eclipses of the satellites of Jupiter." Principia

It happens that people who themselves are so convinced by a story they inherited that Sir Isaac's description just bounces off them in order to support the exotic late 19th century science fiction 'The Time Machine' novel and its formal academic version in the early 20th century.

The Equation of Time represents two surface rotations to the Sun, the constant daily rotation responsible for the 24 hour cycle and the uneven surface rotation as a function of orbital motion responsible for the Polar day/night cycle and where these rotations combine we get the seasons.

No point in throwing good information after bad and especially among those who can't recognise the botched description of the Equation of Time(keeping) as absolute/relative time.