这一旦发生就是是一个(庆祝性的)聚会。

When it happens it is a party.

youdao

她开启了一个全国范围内的运动，致力于推行一个全国性的节日，宣称在庆祝这个传统节日时，会带来家人团聚。

She began a nationwide campaign to have a national holiday declared that would bring families together while celebrating the traditional festivals.

youdao

她发起了一项全国性的运动，希望设立一个全国性的节日，让家庭团聚在一起庆祝这个传统节日。

She began a nationwide campaign to have a national holiday declared that would bring families together while celebrating the traditional festival.

youdao