birthday是不是可数名词

birthday是可数名词。
birthday：
n、生日。
复数： birthdays、

I pletely forgot her birthday, what with one thing and another、

因为忙得不可开交，我把她的生日忘得一干二净。

We're getting up a party for her birthday、

我们正在筹备她的生日聚会。

Are you having a big do for your birthday?

你打算举行大型生日宴会吗？

What did you get for your birthday?

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。