def build_time_rules(rule, expression)
      rule = rule.hour_of_day(*expression.hour) unless expression.hour.blank? || expression.hour == [0]
      rule = rule.minute_of_hour(*expression.minute) unless expression.minute.blank? || expression.minute == [0]

      rule
    end
def build_time_rules(rule, expression)
      rule = rule.hour_of_day(*expression.hour) unless expression.hour.blank? || expression.hour == [0]
      rule = rule.minute_of_hour(*expression.minute) unless expression.minute.blank? || expression.minute == [0]

      rule
    end
:nodoc: