Number + 月
月 (yuè) means "month" and is used in Chinese dates to indicate the month of the year. It is placed after a number to form a specific month, such as 一月 (January) or 十二月 (December).
我们计划七月去旅行。
Wǒmen jìhuà qī yuè qù lǚxíng.
We plan to travel in July.
她的生日在三月。
Tā de shēngrì zài sān yuè.
Her birthday is in March.
公司每年一月召开年度大会。
Gōngsī měi nián yī yuè zhàokāi niándù dàhuì.
The company holds its annual meeting every January.