File tmngr_mod.F90 contains the time manager module. MOM uses this module for working with times and dates but the module can also be exercised in stand alone mode by using script run_tmngr which activates the module's driver (main program). A specific clock and calendar, which may be changed, are defined within the module's driver along with a timestep length and specific intervals for certain events. The driver then integrates time forward (one timestep at a time) and indicates on which time steps the requested events take place. This time manager is well suited for use in any modelling project. Note that it depends heavily on Fortran 90 constructs. The following writeup was contributed by Jeff Anderson (jla@gfdl.com).