这个特价优惠月底前有效。

This special offer is valid until the end of the month.

《牛津词典》

现在许多酒店和旅行社都有特价优惠。

Many tour operators and hotels are offering extraordinary discounts.

youdao

咱们在那个假期有个特价优惠。

We are not running a special offer on the holiday.

youdao

They have a special offer on car rentals this month.

这个月他们还有租车的特价优惠。

I'd rather 实战 - SpeakingMax英语口语达人