  A global intrinsic time in Friedmann - Robertson - Walker models is
proportional to a scaling factor of the spatial metric. The aim of the paper is
to study an applicability of the intrinsic global time chosen to nearest
non-symmetric cases by taking into account linear metric perturbations. Scalar
linear perturbations add some corrections to the effective energy density in
the Hubble law. The metric vector and tensor perturbations in linear
approximation do not influence the intrinsic time.
