return self

        self.set_seconds(self.get_seconds() + t.get_seconds())

        return self.set_seconds(self.get_seconds() + t.get_seconds())

    def minues(self, other_time):
        seconds = abs(self.get_seconds() - other_time.get_seconds())
        self.set_seconds(seconds)

    def minues(self, before):
        if self.greater_than(before):  # before midnight
            seconds = abs(self.get_seconds() - before.get_seconds())
            return self.set_seconds(seconds)
        else:                          # after midnight
            print("inside if")
            before_midnight = Time('24:00:00').minues(before)
            return self.add_time(before_midnight)

    def greater_than(self, time):
        return self.get_seconds() > time.get_seconds()

        # 'yyyy-mm-dd'