3 sentences

1. 选定吉日，詹于下月五号。

   xuǎn​dìng jí​rì, zhān yú xià​yuè wǔ​hào.

   An auspicious day has been selected and set for the 5th of next month.

   Source: Dong Chinese Dictionary

2. 据中新社报道，这项政策将于下月起实施。

   jù Zhōng​xīn​shè bào​dào, zhè xiàng zhèng​cè jiāng yú xià​yuè qǐ shí​shī.

   According to a report by China News Service, this policy will be implemented starting next month.

   Source: Dong Chinese Dictionary

3. 下月的房租该交了，我得提前把钱准备好。

   xià​yuè de fáng​zū gāi jiāo le, wǒ děi tí​qián bǎ qián zhǔn​bèi hǎo.

   Next month's rent is due, so I need to get the money ready in advance.

   Source: Dong Chinese Dictionary