学校下个月有三十周年活动。

Xuéxiào xià gè yuè yǒu sānshí zhōunián huódòng.

The school has a 30th anniversary event next month.

今天是他们结婚五周年，所以我们送了一份特别的礼物。

Jīntiān shì tāmen jiéhūn wǔ zhōunián, suǒyǐ wǒmen sòng le yí fèn tèbié de lǐwù.

Today is their fifth wedding anniversary, so we gave them a special gift.

他们准备庆祝结婚五周年。

Tāmen zhǔnbèi qìngzhù jiéhūn wǔ zhōunián.

They are preparing to celebrate their fifth wedding anniversary.