  As extensions to the corresponding results derived for time homogeneous
McKean- Vlasov SDEs, the exponential ergodicity is proved for time-periodic
distribution dependent SDEs in three different situations: 1) in the quadratic
Wasserstein distance and relative entropy for the dissipative case; 2) in the
Wasserstein distance induced by a cost function for the partially dissipative
case; and 3) in the weighted Wasserstein distance induced by a cost function
and a Lyapunov function for the fully non-dissipative case. The main results
are illustrated by time inhomogeneous granular media equations, and are
extended to reflecting McKean-Vlasov SDEs in a convex domain.
