  Timing analysis is a powerful tool used to determine periodic features of
physical phenomena. Here we review two applications of timing analysis to
gravitational microlensing events. The first one, in particular cases, allows
the estimation of the orbital period of binary lenses, which in turn enables
the breaking of degeneracies. The second one is a method to measure the
rotation period of the lensed star by observing signatures due to stellar spots
on its surface.
