A new theory is presented and tested that time itself is the phenomenon that causes the expansion of the universe and that without expansion, time would simply not be. The model of the theory accurately matches observed cosmological luminosity data consequently accurately describing the observed expansion of the universe. The theory implies that the universe exploded outwards within the dimension of time with all particles expanding from this event within a time blast sphere. Each space dimension is wrapped around the time dimension and every object that is gravitationally separate within the time blast-wave will progress on their own time trajectory of time away from time zero. This has the effect that all objects will expand or move apart as the time sphere expands. We observe distant, and therefore historic, objects on a spiral timeline. We have modelled the theory and shown strong agreement with luminosity observations both at low and high redshift without the need for a cosmological constant thus indicating that the universe is not accelerating in its expansion. The model in fact predicts it is decelerating. The theory also predicts that the unperturbed speed of time expansion will impose a limit on the universe in terms of the fastest speed possible and the speed that light must always travel at. With this limit and as no object can ever be stationary in the time dimension, but that faster and heavier objects will expand less, the theory consequently leads us to explain why special and general relativity occur. Gravity can be explained by the clumping of matter into the dimension of time causing a localised slowing of expansion subsequently causing time dilation and thus resulting in an attractive force with other objects. By this theory, black holes are not singularities but are simply dimples on the time blast wave front.

We present a new theory to explain the expansion of the universe that augments general relativity to create a container within which quantum effects can be explained by treating time as an artefact of a fourth spatial dimension. The theory is tested by accurately modelling against stellar luminosity data that is available for redshifts, z

We present a geometric reinterpretation of cosmic expansion in which expansion is treated as an effective spatial dimension whose projection governs observed distances, time evolution, and physical interactions. By modelling the actual path followed by light through this expanded geometry, we introduce a spiral distance that reproduces observed luminosity and angular-distance relations without requiring accelerated expansion or an additional dark-energy component.Within this framework, gravity emerges as a local suppression of expansion, producing time dilation and curvature consistent with general relativity in the weak-field limit. Expansion is shown to be closely tied to the flow of time itself, with proper time corresponding to progression along the expansion direction and deviations from this trajectory giving rise to gravitational and kinematic time dilation. When applied consistently to both Type Ia supernova luminosity data and the angular scale of the cosmic microwave background, the framework naturally reduces the apparent discrepancy between late- and early-universe determinations of the Hubble constant.Extending the model to the quantum domain, we propose that wave–particle duality, spin, and probabilistic behaviour arise from partial delocalization within a finite temporal window. Electric charge is interpreted as a time-phase asymmetry associated with motion in the expansion dimension, with the electromagnetic coupling strength naturally linked to a dimensionless geometric ratio consistent with the fine-structure constant. Quantum entanglement is reinterpreted as a shared time-phase structure, preserving all experimentally verified predictions of quantum mechanics while providing an intuitive geometric explanation for nonlocal correlations without violating relativistic causality.The framework suggests several testable signatures, including limits on entanglement across extreme temporal separations, time-domain interference effects, and cross-scale correlations between quantum phenomena and gravitational time dilation. While fully compatible with existing observations, this approach offers a unified geometric interpretation connecting cosmology, gravity, time, and quantum behaviour, and motivates further theoretical development and experimental investigation.