When someone wishes you Happy Birthday, it is usually because it is on or near your birthday, unless, for some reason, they are being sarcastic.
Birthday Wishes in Poems and Prose moonzori.net
When someone wishes you a Happy Birthday, you should reply with "Thanks a lot".
You should say "thank you" when someone wishes you Happy Birthday.
Thanks
When someone wishes you a Happy Birthday, you should reply with "Thanks a lot".
Thank you. I appreciate the good wishes.
Thank you.
Thank you? Danke.
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.
You can simply say "belated birthday wishes" or "happy belated birthday."
Happy Birthday and best wishes!
Happy wishes
You can wish people happy birthday in many ways. Nowadays people wish each other happy birthday on facebook, send greeting cards to one another, and also exchange gifts.