April first is a day on which, in some countries, people try to play tricks on each other.

在有些国家，四月一日是人们开别人玩笑的日子。

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You are hired.Please report to the personnel office on April first at eight o 'clock in the morning.

你已经被录用了，请你在四月一日上午八点钟到人事部报到。

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On April 2, we said goodbye to Tiangong I, China's first space lab.

4月2日，我们告别了天宫一号——中国的第一个空间实验室。

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Here is part of the poem. (READER) The current Poet Laureate,Kay Ryan, opened this year's National Poetry Month April first with a videoconference call to four American community colleges.

VOA: special.2010.04.05

As soon as the Civil War broke out and Lincoln called for volunteers in late April 1861, Uriah Parmelee dropped out of his Junior year at Yale and he joined the first regiment he could get into.

内战爆发时,林肯在1861年四月末召集志愿兵,大三的乌利亚从耶鲁辍学,好不容易入了伍

耶鲁公开课 - 美国内战与重建课程节选

Officials want all forms returned by Census Day,April first.

VOA: special.2010.03.20

Mr. Rifi would retire because of his age on April first, but because of Lebanon's precarious situation, Mr. Mikati asked the cabinet to amend the regulations and extend his term.

WSJ: Lebanese Leader Resigns Amid Sectarian Tensions

By 5 April the first battle ships, including two aircraft carriers, hurriedly set sail for the South Atlantic.

BBC: News | Fight for the Falklands

The bells began their journey back to Chile in April, first being lifted out of the seaside church's porch with the aid of some "small fork lift trucks and some strong men".

BBC: Historic bells sent home to Chile from Swansea church