How do you expect me to remember your birthday, when you never look any older?

I hope your birthday was all that you hoped for.

Wishing you a belated birthday.

I am sorry I missed your birthday, you have had so many I lost track.

I hope your birthday was as special as you are.

Greetings- 2

Happy Belated Early Birthday!

Sorry I forgot the most important day of the year... your Birthday!

Sorry I forgot your birthday. Can you reschedule it for sometime next week?

I hope all your birthday wishes came true.

I'm so lucky to have such a great friend like you... who'd forgive me if I forgot his(/her) birthday. Happy Belated Birthday!

Best wishes for your birthday afterwards.

Greetings- 3

I didn't forget your birthday, I'm just fashionably late.

I'm so sorry I missed your birthday, I hope that you had a wonderful day.

I may have forgotten your birthday, but I didn't forget about you!

I didn't forget about your birthday; I just wanted to help prolong the celebration.

I may have forgotten your birthday, but at least I remember that I forgot your birthday.