Congratulations Iris!
I hope that you will have a merry celebration of your 15th birthday (if not today on another day) and that your upcoming 16th year of life is going to be one just like you hope it to become.
A year of health, success, happiness, love, and peace (I don't expect any of those wishes to contradict your own ones, or am I mistaken?

).
When you say that only your brother remembered your birthday (and with a wrong age only) are you really sure that they are not trying to play a prank on you? :unsure: