YOU SAID:
I can’t do what I want for my birthday.
INTO JAPANESE
誕生日にやりたいことができません。
BACK INTO ENGLISH
I can't do what I want on my birthday.
INTO JAPANESE
私は私の誕生日にしたいことをすることができません。
BACK INTO ENGLISH
I can't do what I want on my birthday.
You've done this before, haven't you.