  Recently, a general method for calculating conserved charges for (black hole)
solutions to generally covariant gravitational theories, in any dimensions and
with arbitrary asymptotic behaviors has been introduced. Equipped with this
method, which can be dubbed as "solution phase space method," we calculate mass
and angular momentum for the Kerr-dS black holes. Furthermore, for any choice
of horizons, associated entropy and the first law of thermodynamics are
derived. Interestingly, according to insensitivity of the analysis to the
chosen cosmological constant, the analysis unifies the thermodynamics of
rotating stationary black holes in 4 (and other) dimensions with either AdS,
flat or dS asymptotics. We extend the analysis to include electric charge, i.e.
to the Kerr-Newman-dS black holes.
