on one's birthday
表示在生日当天，用介词on。
I will see you on my birthday.
我生日那天见。
某人出生的周年纪念日；生日(出生纪念日或其庆祝活动)；某物创建的周年纪念日；出生日期；某人出生或某物创建的日期,通常称为出生日期或出生日期
the anniversary of the day on which a person was born; the celebration of that day
某人出生的周年纪念日
The anniversary of the day on which someone is born.
生日(出生纪念日或其庆祝活动)
an anniversary of the day on which a person was born (or the celebration of it)
某物创建的周年纪念日
The anniversary of the day on which something is created.
出生日期
the date on which a person was born
某人出生或某物创建的日期,通常称为出生日期或出生日期
The date on which someone is born or something is created, more commonly called birthdate or date of birth.
生日聚会
A birthday party.
My birthday falls on a Monday this year, so I will celebrate it next weekend.
我今年的生日恰好是星期一，所以我打算下个周末庆祝。
用法提示：句子中“birthday”为名词，表示生日，作主语。
They surprised me with a cake at my birthday party last night.
昨晚他们在我的生日派对上用蛋糕给了我一个惊喜。
用法提示：句子中“birthday”为名词，作定语修饰“party”，指生日的聚会。
Have you bought a birthday present for your brother yet?
你给你弟弟买生日礼物了吗？
用法提示：句子中“birthday”为名词，作定语修饰“present”，表示生日礼物。
表示在生日当天，用介词on。
I will see you on my birthday.
我生日那天见。
固定祝福用语。
Happy birthday to you!
祝你生日快乐！
celebrate后直接接birthday。
She celebrates her birthday with friends.
她和朋友一起庆祝生日。
birthdate强调具体的出生日期，用于正式场合或填写表格；birthday更常指庆祝的纪念日，在表达生日祝福时不可替换。
grammar · medium
易错句子I birthday today.
正确表达It's my birthday today.
生日是名词，不能用作动词。中文的‘我今天生日’直译会导致错误，英语中须用‘It is my birthday’或‘Today is my birthday’表达。
grammar · medium
易错句子Happy birthday you!
正确表达Happy birthday to you!
‘Happy birthday’后需要加介词‘to’引出祝福对象，中文‘生日快乐你’的直译缺少‘to’，英语中这个介词不可省略。
birthday 是生日，birth 是出生，强调出生的动作或事件。
birthday 专指个人的生日，anniversary 指任何事件的周年纪念日。
生日派对
We are planning a surprise birthday party for her.
我们正在为她策划一个惊喜生日派对。
生日蛋糕
She blew out the candles on her birthday cake.
她吹灭了生日蛋糕上的蜡烛。
生日礼物
I bought a nice birthday present for my brother.
我给弟弟买了一份不错的生日礼物。
生日贺卡
He sent me a beautiful birthday card with a handwritten message.
他寄给我一张漂亮的生日贺卡，上面有手写的祝福语。
生日快乐
Everyone sang 'Happy Birthday' to the guest of honor.
大家向主宾唱了《生日快乐歌》。
生日愿望
Make a wish on your birthday and it might come true.
在生日那天许个愿，它可能会实现。
（幽默）一丝不挂；裸体
He was caught in his birthday suit when the delivery man arrived.
快递员到的时候，他正好一丝不挂。
寿星（指过生日的男性）
Make a wish, birthday boy!
许个愿吧，寿星！
寿星（指过生日的女性）
The birthday girl blew out all the candles on her cake.
寿星吹灭了蛋糕上所有的蜡烛。
你说这是你的生日，也是我的生日，耶
From the song 'Birthday' by The Beatles, often sung at parties.
来自披头士乐队的歌曲《生日》，常在派对中唱起。
生日快乐，总统先生
Marilyn Monroe's iconic performance singing to President John F. Kennedy in 1962.
1962年玛丽莲·梦露为约翰·F·肯尼迪总统献唱的经典表演。
发长 /eɪ/ 音 (如 day, play)
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.