Today is a national holiday in Japan. It is Sports Day.

今天是日本的国定假日：体育日。

《柯林斯英汉双解大词典》

In the USA, Labor Day is a national holiday.

在美国，劳动节是一个国家节日。

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She began a nationwide campaign to have a national holiday.

她开启了一个全国范围内的运动，致力于推行一个全国性节日。

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The last Monday in May is a national holiday.

VOA: special.2009.05.25

After the end of apartheid in 1994, the new government proclaimed the date South Africa's Human Rights Day and made it a national holiday.

VOA: standard.2010.03.21

During this period, Hooks helped articulate the group's positions on racial equity in hiring and school admissions and the creation of a national holiday to honor the late Martin Luther King,Jr.

VOA: standard.2010.04.16

Capital markets in China were closed for a national holiday and will reopen on Monday.

FORBES: Shanghai Discovers Two More Cases Of Deadly Bird Flu; More Poultry Markets Shut

Capital markets in China were closed for a national holiday and will reopen today.

FORBES: H7N9 Bird Flu Cases Reach 21 In China; Death Total Unchanged At Six

Following those attacks, Iraq announced a national holiday from March 25 to April 1.

CNN: Arab League summit aims to showcase 'the new Iraq'