生日快乐用英语说：Happy Birthday.“Happy Birthday” 是我们生日时候所说 “生日快乐” 的英文表达，随着英语的广泛应用，越来越多的人用英文来表达祝福。现在过生日唱《生日快乐歌》，会先唱一遍中文再唱一遍英文。
生日快乐的20中不同表达
1. Many happy returns of the day!
2. Have a good one!
3. Have a great birthday!
4. All the best!
5. Many more happy returns!
6. I wish you a wonderful birthday!
7. May your birthday be filled with laughter!
8. I hope you have a wonderful birthday.
9. I wish you all the best on your special day.
10. I hope you have a fantastic day and a fantastic year to come.
11. Wishing you a day that is as special as you are.
12. Have a fabulous birthday!
13. Wishing you many more candles to blow.
14. All the best on your special day!
15. May you have a fantastic day and many more to come!
16. I wish you a happier birthday than anyone else has wished you.
17. Happy oldieth birthday.
18. Have a great one!
19. It’s time to celebrate!
20. Happy Birthday!
