  Several different factors influence the seasonal cycle of a planet. This
study uses a general circulation model and an energy balance model (EBM) to
assess the parameters that govern the seasonal cycle. We define two metrics to
describe the seasonal cycle, $\phi_s$, the latitudinal shift of the maximum
temperature, and $\Delta T$, the maximum seasonal temperature variation
amplitude. We show that alongside the expected dependence on the obliquity and
orbital period, where seasonality generally strengthens with an increase in
these parameters, the seasonality depends in a nontrivial way on the rotation
rate. While the seasonal amplitude decreases as the rotation rate slows down,
the latitudinal shift, $\phi_s$, shifts poleward. A similar result occurs in a
diffusive EBM with increasing diffusivity. These results suggest that the
influence of the rotation rate on the seasonal cycle stems from the effect of
the rotation rate on the atmospheric heat transport.
