There is an unusual holiday in the US that falls on the fourth Thursday of April every year.

每年4月的第四个星期四，美国有一个不寻常的节日。

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Grain Rain often starts in April, the fourth month of the year.

谷雨通常在四月，也就是一年中的第四个月。

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On April fourth, the nation's top civil rights leader, the Reverend Martin Luther King,Junior, was shot and killed in Memphis,Tennessee.

VOA: special.2009.08.30

This year's National Cherry Blossom Festival is set for March twenty-seventh through April fourth.

VOA: special.2010.02.23

On April fourth,nineteen forty-nine, twelve countries signed the North Atlantic Treaty in Washington.

VOA: special.2009.04.04

Three of the videos, which contain a clear image of the man, are date-stamped April 14, a fourth is dated April 27, and all four appear to have been posted on the Internet several days later, on May 2.

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Three videos were date-stamped April 14, and the fourth was dated April 27.

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Since then the bank has conducted a third auction in March and confirmed a fourth in April.

ECONOMIST: Credit squeeze