When someone gives you a birthday wish, it is fine to give a simple thank you as a reply.
A person may wish someone an early happy birthday, it may because they will not see the person on their birthday. If someone wishes a person early birthday wishes, it is appropriate to say thank you.
Thank you
Respected sir,Wish you a very Happy Birthday!And we hope you have a great day today!!Thank you.
Just say "thanks a lot my dear"
Say thank you!! My AlLFrnDz
Thank you? Danke.
You can simply say Thank you to the other person. You could also say Bless You to them.
Thank you , wish you too have the best for your upcoming life.
Obrigado para o aniversário desejo
I usally say "thank you". And then hug him/her. And of course I never forget to wish them a happy birthday on their birthday!! ;) Hope I helped!
I would smile and say Thank you and give them a hug.