code: def adjust_mod_follow(self, holidays_obj=None):
          
          month = self.month
          new = BusinessDate.adjust_follow(self, holidays_obj)
          if month != new.month:
              new = BusinessDate.adjust_previous(self, holidays_obj)
          self = new
          return self
docs: adjusts to Business Day Convention "Modified [Following]" (4.12(a) (ii) 2006 ISDA Definitions).