错误就是不能用介词for，而应该是to，happy birthday to you为固定搭配，中文意思是生日快乐祝你生日快乐

Do you know that the "Happy Birthday to You" song is the first song sung in outer space?你知道吗“祝你生日快乐”这首歌是在外太空唱的第一首歌。