生日快乐的英语怎么写

"Happy Birthday"是表达"生日快乐"的英语短语，这四个单词都是英文中的常用词汇，简单明了，直接传达了你的祝福和喜悦，如果你想写更长一些的祝福语，你可以考虑添加一些个人化的元素，比如对方的名字、你们共享的记忆或者你希望对方在未来一年里实现的事情等。

"Dear [Name], on this special day of yours, I want to wish you a very Happy Birthday! may all your dreams and wishes come true, and may this new year of your life be filled with happiness, health, and prosperity. Thank you for being such an important part of my life, and I look forward to creating many more happy memories together. Once again, Happy Birthday!"

如果你需要一个简短的版本，那就只需要说"Happy Birthday"就好。