  We consider time-dependent Lifshitz-type solutions in type IIB supergravity.
The solutions describe a time evolution from Lifshitz spacetimes to AdS spaces.
We argue the holographic relation of them to aging phenomena in condensed
matter physics. The solutions have no time-translation invariance and possess
the dynamical scaling symmetry with z_c=2. In addition, the time evolution
corresponds to slow (nonexponential) dynamics from nonequilibrium states to the
equilibrium. We also discuss a mechanism of quantum quench to generate
nonequilibrium states.
