生日birthday；
birthday的复数birthdays；例如：Are you having a big do for your birthday?
相关介绍What did you get for your birthday?
（图片来自网络侵删）
你收到什么生日礼物了？
The birthday card arrived three days late.
生日贺卡晚到了三天。
What are you giving your father for his birthday?
你打算送给你父亲什么生日礼物？
