  We provide a new perspective on the close relationship between entanglement
and time. Our main focus is on bipartite entanglement, where this connection is
foreshadowed both in the positive partial transpose criterion due to Peres [A.
Peres, Phys. Rev. Lett., 77, 1413 (1996)] and in the classification of quantum
within more general non-signalling bipartite correlations [M. Frembs and A.
D\"oring, arXiv:2204.11471]. Extracting the relevant common features, we
identify a necessary and sufficient condition for bipartite entanglement in
terms of a compatibility condition with respect to time orientations in local
observable algebras, which express the dynamics in the respective subsystems.
We discuss the relevance of the latter in the broader context of von Neumann
algebras and the thermodynamical notion of time naturally arising within the
latter.
