这是我最快乐的一天。

It was my happiest day.

youdao

今天，是我最难忘的一天，也是我最快乐的一天。

Today, I am the most memorable day is my happiest day.

youdao

我过了很多次春节，最让我记忆犹新的是2012年的春节，因为那一天是我最难忘的一天，而且也是我最快乐的一天。

I had many times before the Spring Festival, the 2012 Spring Festival is the most let me remember, because that day is my most memorable day, but it is also my most happy day.

youdao