How about an observation, rather than a theory?
We are mobile organisms, which logically explains this sequence of perceptions, by which we experience our reality, as a function of navigation. Consequently our concept of time is as the point of the present, moving past to future. Culture formulates it as narrative and physics codifies it as measures of duration.
The reality is that change turns future to past. Tomorrow becomes yesterday, because the earth turns. Duration is the present, as the events rise and fall.
Like seeing the heavens spin east to west, while it's the earth turning west to east.
There is no literal dimension of time, because the past is consumed by the present, to inform and drive it. Causality and conservation of energy. Cause becomes effect.
Different clocks can run at different rates simply because they are separate actions. Think metabolism.
That culture is about getting everyone following the same rules, using the same measures, etc, it might seem like there is some universal flow of time, but it's rabbit time, turtle time, etc.
That nature can be so diverse and integrated is because everything doesn't march to the beat of the same drummer. Multicultural, not monocultural.
Synchronization is centripetal, while harmonization is centrifugal. Nodes and networks, organisms and ecosystems, particles and fields.
Time is asymmetric, because it is a measure of action and action is inertial. The earth only turns one direction. Entropy is a second order effect and not what is directly measured.
That different events will be observed in different order from different locations is no more consequential than seeing the moon as it was a moment ago, simultaneous with seeing stars as they were years ago. It's the energy conserved, not the information. That the information changes is time.
Energy is "conserved," because it is the present, creating time, as well as temperature, pressure, color and sound. Time is frequency, events are amplitude.
Ideal gas laws correlate volume with temperature and pressure, but we don't refer to them as dimensions of space, even though they are as foundational to our emotions and bodily functions, as sequence is to thought.
As present, energy goes past to future, while the patterns generated go future to past.
Energy drives the wave, the fluctuations rise and fall. No tiny strings necessary.
Consciousness also goes past to future, while the perceptions, emotions and thoughts giving it form and structure go future to past. Though it's the digestive, respiratory and circulatory systems processing the energy, feeding the flame, while the central nervous system sorts the information, signals from the noise.
Consequently there is an intellectual tendency to divide reality into order and chaos, rather than energy and form, even though galaxies are energy radiating out, as structure coalesces in.
Safe to say, I've been banned from a fair number of sites for raising this and some other, related points, but no one actually bothers to refute them.
I'm not part of the monoculture.