def build_weekday_rule(rule, expression)
      return rule.day_of_week(*expression.day_of_week) if !expression.day_of_week.blank? && nth_day?(expression.day_of_week)
      return rule.day(*expression.day_of_week) unless expression.day_of_week.blank?

      rule
    end
def build_weekday_rule(rule, expression)
      return rule.day_of_week(*expression.day_of_week) if !expression.day_of_week.blank? && nth_day?(expression.day_of_week)
      return rule.day(*expression.day_of_week) unless expression.day_of_week.blank?

      rule
    end
:nodoc: