庆祝活动的英文：
festivity

An impressive ceremony
重大的庆祝活动

The swearing-in is only one part of the inaugural celebration.
宣誓就职只是就职庆祝活动一个部分。

Night before the feast of the Epiphany,formerly celebrated with festivities
显现节的前夕(旧时有庆祝活动).

I'd rather not partake in the festivities.
我宁可不参加庆祝活动。

The whole nation joined in the celebration.
全国都参加了庆祝活动。

The celebrations provided a magnificent spectacle.
庆祝活动呈现一派宏伟的景象。

One of the anniversary observance will be the Centennial Twin Club Project.
百周年庆祝活动其中是所谓的百年纪念姊妹社计划。

Their celebrations at Christmas are not unlike our own.
他们的圣诞节庆祝活动跟我们自己的并无不同.

Before the waiter brought the sherry the rocket that announced the fiesta went up in the square.
不等侍者把酒送来，一颗宣布节日庆祝活动开始的焰火弹就已经在广场上腾空而起。

It celebrated its 50th anniversary last Monday.
上周一,美国为该事件举行了50周年庆祝活动。

The biggest festival in my country is the Spring Festival.
我国最大的节日是春节。

The carnival was immersed in a festival atmosphere.
嘉年华沉浸在喜庆的节日气氛中。

Spring festival is the chinese day.
春节是中国人的节日。

There is a poster about the pop festival.
有一张关于流行音乐节的海报。

They are gathering flowers for the festival.
他们正在采集节日用花。