nationalday前面用什么介词

前面用介词on，例如：

1、On National Day many stores cut the price.在国庆节许多商店进行大减价。

2、We will hold a celebration on National Day.我们要在国庆节举行庆典活动。

3、Several new plays will be performed on National Day.国庆日将上演几个新戏。

4、The mother got her children up in their new clothes on national day.国庆节那天，妈妈让孩子们穿上了新衣裳。