Time is standardly treated as a container within which matter is arranged and events occur. This paper rejects that assumption. Time is material occurrence: matter, in configuration, producing the next configuration, locally and without remainder. The present is the occurrence boundary where that production is happening. The past is what has occurred---closed, not hidden, present only as traces in the current material configuration. The future has not yet occurred; it is not a region waiting to be entered. This account grounds temporal asymmetry without borrowing it from thermodynamics or positing a privileged present by fiat. Forward occurrence is 1:1---each configuration produces exactly one successor. Backward inference is 1:many---the present configuration is consistent with a vast number of prior configurations, most of which left no recoverable trace. Causation inherits its asymmetry directly from this structure. Cause and effect are not separated by a time-gap that causation must cross. They are what occurrence is. Every discipline that reads the present for evidence of prior occurrences faces the same structural problem. Physics, palaeontology, and the human sciences differ in the richness of their traces and the power of their epistemic toolkits. They do not differ in their relationship to the past.
Daniel Reidpath (Sat,) studied this question.