def _do_new_calendar_year(self):
self.time['<STR_LIT>'] = <NUM_LIT:0>  <EOL>self.time['<STR_LIT>'] += <NUM_LIT:1><EOL>
This function is called once at the end of every calendar year.

        It updates ``self.time['years_elapsed']`` and
        ``self.time['day_of_year_index']``