The festival is on lunar September 9th.

这个节日在农历九月九日。

youdao

What's the date today? It's September 9th.

今天几号？今天九月九日。

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Now Wang Yan is a 9th grade student in a school.

现在王燕是一所学校的九年级学生。

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In November of 1840, the American people elected their 9th president, William Henry Harrison.

VOA: special.2009.01.29

Recorded September 9th, 1947, Grace Murray Hopper in case you're interested. This was the lab book of Grace Murray Hopper.

想知道的话大概是在1947年9月9号，记载于,的实验手册中。

麻省理工公开课 - 计算机科学及编程导论课程节选

So this was in 9th grade.

这是在他们9年级的时候。

与职业发展咨询老师 - SpeakingMax英语口语达人

The Rome catacombs then fell victim to pillaging by Germanic invaders around the early 9th Century.

BBC: Exploring the history of catacombs

Fittingly, it was near the 9th Street market that two Italian brothers co-created the cheesesteak, albeit accidentally.

BBC: Love, war and the Philly cheesesteak

Over the last several weeks, this metric has risen, reaching 54% on April 9th.

FORBES: Dunkin' Donuts Gains in Perception with New Food and Drink Items