Near-Empty Regimes and Local Temporal Construction: Cosmic Voids as a Stress Test for Regime-Dependent Time

Previous work has treated time as the ordered construction of accessible informationand cosmic age as a regime-dependent readout of primordial structure. That frameworkis strongest in high-density or high-compression regimes. The present paper subjects it tothe opposite limit: regions of very low matter density and sparse structure, observationallyrealised as cosmic voids.We argue that a consistent informational account of time predicts, in such near-emptyregimes, a reduced local construction of temporal order: few stabilisable distinctions, thininformational geometry, and limited structural history. This is not a claim that metric timein general relativity stops, nor that photons fail to propagate. Light traverses voids; clockscan still be defined. What is reduced is the amount of local informational structure availableto be ordered as temporal process.To clarify the distinction between metric time and informational temporal construction,we recall the standard relativistic asymmetry between distant and local temporal descriptionsnear a black-hole horizon. That asymmetry is used only as a controlled analogy for regimedependent readout, not as a dynamical model of voids. Cosmic voids and black-hole horizonsstand at opposite extremes of density; both, however, illustrate that temporal descriptiondepends on conditions of access.The paper positions cosmic voids as a stress test for the informational theory of time,identifies where the theory aligns with large-scale structure observations, and states whereit must remain silent.