I've got another commitment on April 9th, though.

不过4月9日我还有另外的事。

youdao

There's one on April 9th, and another on 14th May.

一次在4月9日，另一次在5月14日。

youdao

On April 9th he announced he would retire in the summer.

他己在4月9日正式宣布会于今年夏天退休。

youdao

on Easter Sunday, April 9th, 1939.

VOA: special.2009.01.25

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

But on April 9th, in a surprise vote, the lower house of France's parliament rejected the law.

ECONOMIST: Internet regulation in France

On April 9th Toyota, Japan's largest car marker, announced that it plans to go into electricity generation.

ECONOMIST: Deregulation in Japan