When are you going to celebrate your birthday?
...
When is he going to celebrate his birthday?
He is going to celebrate his birthday tomorrow.
When is she going to celebrate her birthday?
She is going to celebrate her birthday...
When are you going to celebrate your birthday?
I am going to celebrate my birthday this afternoon.
When is dad going to celebrate his birthday?
Dad is going to celebrate his birthday this sunday.
When is mom going to celebrate her birthday?
Mom is going to celebrate her birthday next week.
When is he going to celebrate his birthday?
He is going to celebrate his birthday next summer.
