What to write in a birthday card

1. Happy, happy, happy birthday!! Don't forget your a year older.
2. Thanks for inviting us all to come celebrate your birthday!! Hope the cake is good :) All the best.
3. Wishing you a very Happy Birthday!! We hope you have a great day and all your wishes come true.
4. Wishing you a very Happy Birthday!! We hope you have a wonderful day and get spoilted with gifts!
5. Happy Birthday!! We hope all your dreams and wishes come true
6. Happy Birthday!! Wishing you all the best for today and in the future. Now let's PARTY!!!
7. Better late than never so HAPPY BIRTHDAY!! Wishing you all the best my friend - All the best.
8. Happy birthday old [man/lady]!
9. Happy birthday you oldie but goodie!! We hope all your wishes come true.
10. Wishing you a happy [X]th birthday. All the best.
11. HAPPY BIRTHDAY!!! Wishing you a great year ahead.
12. Happy Birthday!! You're now older and hopefully wiser - Have a great day.
13. Card messages messages aren't my thing - Happy Birthday!
14. Happy birthday [name]!! We hope you have a great day and get spoilt rotten! Love you lots.
15. Wishing you a great birthday!! All the best and we hope you get lots of presents!! All the best.
16. Happy birthday to my best friend!! Wishing you all the best and we hope you have a great year ahead
17. Wishing you all the best on your birthday - We hope you get spoiled with lots of presents!! All the best.
18. Happy Birthday!! Tonight will be a big one - All the best.
19. Wishing you a great day, year, century(just joking) - HAPPY BIRTHDAY!! Hope you have a great day.
20. Happy birthday oldie!! We'll be pumping the music up tonight just so you can hear it.
21. Happy birthday!! Wishing you all the best on your special day.

Source: http://www.greeting-card-messages.com/what-to-write-in-a-birthday-card.php