真是愉快的一天用英文怎么说

"It's been a depghtful day" 是表示愉快的一天的常用说法。

depghtful 作形容词，意思是令人愉悦的，令人高兴的。

例句：

It was a depghtful day at the beach. (海滩上是一个愉快的一天)
The concert was depghtful. (音乐会很愉快)
The food was depghtful. (食物很美味)