”明天要放假了，真好啊“翻译成英语

great,we will have a vacation starts from tomorrow!
如果你讲的是不止一天的话这个比较好。

How nice it is to have a day off tomorrow!

It is wonderful that i will have holiday tomorrow.

Cool! Tomorrow we will free!

呵呵，最常用的当然是 TGIF 啦，稍微改一下可以是：

Thank God It will be holiday tomorrow.