B2 noun #500 most common 4 min read

birthday

A birthday is the day each year that marks the anniversary of when you were born.

Explanation at your level:

A birthday is a special day. It is the day you were born. Every year, you have a birthday. You can have a party with cake and presents. People say, 'Happy birthday!' to you. It is a very happy day for everyone.

Your birthday is the anniversary of the day you were born. Most people celebrate their birthday with family and friends. You might eat a birthday cake with candles on it. It is common to receive birthday cards or gifts from people who care about you. How old are you on your next birthday?

A birthday is the annual celebration of the day a person was born. It is a milestone that marks how much you have grown. In many countries, people host birthday parties, invite friends, and share a meal. It is also important for legal reasons, as your birthday determines when you reach certain ages, such as when you can vote or drive. It is a day to reflect on the past year and look forward to the next one.

The term birthday refers to the anniversary of one's birth, but it carries significant cultural and social weight. Beyond the festive elements like parties and gifts, it serves as a primary marker for identity and legal status. People often use the term to describe the day itself, but it can also be used in compound nouns like birthday bash or birthday wish. Whether it is a quiet family dinner or a large celebration, the birthday remains a universal way to acknowledge the passage of time.

While typically associated with personal celebration, the birthday functions as a critical chronological anchor in both private and public life. Academically, it is the standard reference point for calculating age, which dictates legal capacity and social obligations. Culturally, the birthday has evolved from ancient rituals into a global commercial phenomenon, characterized by specific traditions such as the singing of 'Happy Birthday to You.' The nuance of the word lies in its duality: it is both a deeply personal, emotional event and a rigid, objective legal fact. Understanding its usage requires recognizing both its celebratory connotations and its role in formal record-keeping.

The birthday is a multifaceted concept that bridges the gap between individual biography and societal structure. Etymologically rooted in Germanic traditions, the celebration of the birthday has undergone significant shifts, moving from aristocratic privilege to a ubiquitous modern custom. In a literary or metaphorical sense, a birthday can represent a 'rebirth' or the inception of a new phase of existence. Legally, the birthday is the definitive threshold for agency; it is the moment an individual transitions from one legal status to another. In contemporary discourse, the birthday is also a site of tension between the desire for authentic celebration and the pressures of consumerism. Whether viewed through the lens of history, law, or social psychology, the birthday remains a fundamental pillar of human experience, marking the relentless, yet celebrated, progression of time.

Word in 30 Seconds

  • Birthday is the anniversary of your birth.
  • It is a countable noun.
  • It is commonly used with 'happy' and 'party'.
  • It serves as a legal reference for age.

Think of a birthday as your personal yearly milestone. It is the exact date on the calendar that matches the day you entered the world. For most people, it is a time of celebration, often involving cake, presents, and gatherings with friends and family.

Beyond the party aspect, the birthday serves a vital function in society. It acts as a standard reference point. Without birthdays, it would be nearly impossible to track how old someone is, when they are allowed to drive, or when they reach the age of majority. It is the anchor for your personal timeline.

When we talk about a birthday, we are usually referring to the anniversary of the birth. Interestingly, we celebrate the day, not the actual moment of birth itself. It is a universal human experience that transcends almost all cultures, though the way we celebrate can vary wildly depending on where you live.

The word birthday is a classic compound, formed from the Old English words byrd (birth) and dæg (day). It has been part of the English language for centuries, evolving from the Germanic roots found in languages like Old Norse burðr.

Historically, the tradition of celebrating birthdays is quite ancient. In many early civilizations, birthdays were reserved for royalty or high-ranking figures. The ancient Egyptians, Greeks, and Romans had specific customs for marking these days, often involving offerings to gods or spirits to protect the person from bad luck during the coming year.

The modern concept of the birthday party, complete with candles and cake, became more widespread in the 18th and 19th centuries, particularly in Germany with the Kinderfest. Over time, the practice became democratized, moving from a luxury for the elite to a common celebration for people of all ages and backgrounds across the globe.

Using the word birthday is very straightforward. You most commonly hear it in phrases like happy birthday or birthday party. It is a neutral term that works perfectly in both casual conversation with friends and formal documents like passport applications.

When you are talking about someone's age, you might say, "It is her 21st birthday." Notice that we use ordinal numbers (first, tenth, twenty-first) to describe which birthday it is. You can also use it as an adjective, as in birthday cake, birthday gift, or birthday suit (a humorous idiom for being naked).

In professional settings, you might see it on forms as Date of Birth (DOB). While birthday is acceptable in most contexts, date of birth is preferred for legal or medical paperwork. Always remember that birthday refers to the anniversary, whereas birth date refers to the specific calendar date (month, day, and year) you were born.

  • Birthday suit: This is a humorous way to say someone is not wearing any clothes. Example: The toddler ran around the garden in his birthday suit.
  • Many happy returns: A formal way to wish someone a happy birthday. Example: I sent her a card saying, 'Many happy returns of the day.'
  • Birthday blues: Feeling sad or depressed on your birthday. Example: Don't let the birthday blues get you down; let's go out for dinner!
  • Born with a silver spoon in one's mouth: While not strictly about birthdays, it relates to the circumstances of one's birth. Example: He never had to work because he was born with a silver spoon in his mouth.
  • A new lease on life: Often used when someone survives a near-death experience on their birthday. Example: After the accident, he felt like his birthday gave him a new lease on life.

Grammatically, birthday is a countable noun. You can have one birthday, or you can talk about birthdays in general. It follows standard pluralization rules: birthdays. You will often see it used with the possessive, like "It's Sarah's birthday."

Pronunciation is fairly consistent. In British English (RP), it is /ˈbɜːθdeɪ/, while in American English, it is /ˈbɜːrθdeɪ/. The key difference is the rhotic 'r' in American English. The stress is always on the first syllable: BIRTH-day.

Rhyming words include earth-day, mirth-day (rare), and Thursday (which shares the same ending sound). When using it in a sentence, it usually takes the definite article the or a possessive pronoun like my, your, or his. You wouldn't typically say "I am having birthday," but rather "I am having a birthday party" or "It is my birthday."

Fun Fact

The song 'Happy Birthday to You' is one of the most recognized songs in the world.

Pronunciation Guide

UK /ˈbɜːθdeɪ/

The 'r' is silent, making the 'ur' sound long.

US /ˈbɜːrθdeɪ/

The 'r' is clearly pronounced.

Common Errors

  • Pronouncing the 'th' as 's'
  • Separating the word into two
  • Misplacing the stress on the second syllable

Rhymes With

earthday mirthday Thursday birthday birth-day

Difficulty Rating

Reading 1/5

Very easy to read

Writing 1/5

Very easy to write

Speaking 1/5

Very common word

Listening 1/5

Very common word

What to Learn Next

Prerequisites

born day year age

Learn Next

anniversary milestone celebration

Advanced

chronology legal capacity demographics

Grammar to Know

Possessive Adjectives

My birthday

Compound Nouns

Birthday

Ordinal Numbers

21st birthday

Examples by Level

1

Today is my birthday.

Today = this day, my = belonging to me

Possessive pronoun

2

I have a birthday party.

Party = celebration

Indefinite article

3

Happy birthday to you!

Standard greeting

Fixed expression

4

He likes his birthday.

Likes = enjoys

Verb usage

5

Is it your birthday?

Question format

Interrogative

6

I want a birthday cake.

Cake = sweet dessert

Noun adjunct

7

She got a birthday gift.

Got = received

Past tense

8

It is a big birthday.

Big = important

Adjective usage

1

When is your birthday?

2

I am excited for my birthday.

3

We sang for his birthday.

4

She baked a birthday cake.

5

Did you enjoy your birthday?

6

I received many birthday cards.

7

My birthday is in June.

8

We celebrated her 10th birthday.

1

I am planning a surprise birthday party.

2

His birthday falls on a Monday this year.

3

She forgot my birthday last year.

4

We should send him a birthday card.

5

The birthday boy looked very happy.

6

I have a birthday dinner tonight.

7

What do you want for your birthday?

8

It is my birthday today!

1

I am taking the day off for my birthday.

2

He celebrated his birthday in style.

3

She is dreading her 40th birthday.

4

The birthday celebrations lasted all weekend.

5

I sent a birthday greeting to my boss.

6

We are having a joint birthday party.

7

He received a birthday present from his sister.

8

It is a tradition to have cake on your birthday.

1

The legal age is determined by one's birthday.

2

He marked his birthday with a quiet reflection.

3

The company is celebrating its tenth birthday.

4

She was born on the birthday of the queen.

5

The birthday festivities were quite elaborate.

6

He forgot the date of his own birthday.

7

The birthday paradox is a famous probability puzzle.

8

She spent her birthday volunteering at the shelter.

1

The birthday of the nation is celebrated annually.

2

He viewed his birthday as a milestone of maturity.

3

The birthday ritual is deeply embedded in the culture.

4

She was born on the birthday of a famous poet.

5

The birthday gala was attended by many dignitaries.

6

He contemplated his life on his birthday.

7

The birthday cake was an architectural marvel.

8

She marked the birthday of the movement with a speech.

Synonyms

anniversary date of birth natal day DOB name day

Antonyms

deathday date of passing

Common Collocations

birthday party
birthday cake
birthday gift
happy birthday
birthday card
celebrate a birthday
birthday bash
birthday wish
birthday suit
birthday girl/boy

Idioms & Expressions

"Birthday suit"

Being naked.

The baby was in his birthday suit.

casual

"Many happy returns"

A greeting wishing someone a happy birthday.

Many happy returns of the day!

formal

"Birthday blues"

Feeling sad on your birthday.

I have the birthday blues today.

casual

"Born with a silver spoon"

Born into a wealthy family.

He was born with a silver spoon in his mouth.

neutral

"A new lease on life"

A fresh start, often after a birthday.

Turning 50 gave him a new lease on life.

neutral

"Age before beauty"

A joke often said on birthdays.

After you, age before beauty!

humorous

Easily Confused

birthday vs Birth date

Both refer to birth.

Birth date is the specific calendar date; birthday is the anniversary.

My birth date is May 5th, 1990.

birthday vs Anniversary

Both are yearly events.

Anniversary is broader; birthday is for birth.

Wedding anniversary vs. Birthday.

birthday vs Birthplace

Both start with birth.

Birthplace is the location; birthday is the time.

My birthplace is London.

birthday vs Birth

Root word.

Birth is the event; birthday is the anniversary.

The birth of a child.

Sentence Patterns

A1

Subject + verb + birthday

I celebrated my birthday.

A1

It is + possessive + birthday

It is my birthday.

A2

Subject + verb + for + birthday

I bought a gift for his birthday.

B1

Subject + verb + on + birthday

I took the day off on my birthday.

B2

Subject + verb + birthday + with + noun

She celebrated her birthday with a party.

Word Family

Nouns

birth The emergence of a baby from the body.

Verbs

birth To give birth to.

Adjectives

birthday-related Connected to a birthday.

Related

anniversary synonym for yearly event

How to Use It

frequency

9/10

Formality Scale

Natal day (Formal) Birthday (Neutral) B-day (Casual) Birthday suit (Slang)

Common Mistakes

I have a birthday in June. My birthday is in June.
We use 'my' to show possession of the date.
It is my birth day. It is my birthday.
It is one word.
I am celebrating my birth. I am celebrating my birthday.
Celebrating birth refers to the act of being born, not the anniversary.
What is your birth date? When is your birthday?
Birthday is for the anniversary; birth date is for the specific calendar day.
Happy birth day to you! Happy birthday to you!
Birthday is a single compound word.

Tips

💡

Memory Palace Trick

Imagine your birthday cake in your kitchen.

💡

When Native Speakers Use It

Used in greetings and event planning.

🌍

Cultural Insight

Birthdays are celebrated differently globally.

💡

Grammar Shortcut

Always use 'my' or 'his/her' before birthday.

💡

Say It Right

Focus on the 'th' sound.

💡

Don't Make This Mistake

Don't say 'birth day' as two words.

💡

Did You Know?

The song is copyrighted in some regions.

💡

Study Smart

Use the word in a sentence about your own birthday.

💡

Stress Pattern

Always stress the first syllable.

🌍

Global Context

Some cultures count age differently.

Memorize It

Mnemonic

BIRTH + DAY = The day you were born.

Visual Association

A cake with candles.

Word Web

cake gifts party age candles

Challenge

Ask three friends when their birthday is.

Word Origin

Old English

Original meaning: The day of one's birth.

Cultural Context

Some cultures do not celebrate birthdays, or celebrate them on specific dates like the lunar calendar.

Birthdays are typically celebrated with cake, candles, and the 'Happy Birthday' song.

The song 'Happy Birthday to You' The 'Birthday Paradox' in mathematics

Practice in Real Life

Real-World Contexts

Parties

  • Happy birthday
  • Blow out candles
  • Open gifts

Legal/Forms

  • Date of birth
  • Age verification
  • Legal capacity

Social

  • Birthday wish
  • Birthday card
  • Surprise party

Work

  • Company anniversary
  • Birthday leave
  • Team celebration

Conversation Starters

"How do you usually celebrate your birthday?"

"What is the best birthday gift you have ever received?"

"Do you prefer big parties or small dinners for your birthday?"

"Have you ever had a surprise birthday party?"

"What is your favorite birthday tradition?"

Journal Prompts

Describe your most memorable birthday.

If you could have any birthday party, what would it be like?

How do you feel about getting older each year?

What is a tradition you would like to start for your birthday?

Frequently Asked Questions

8 questions

It is one word.

Only if it is part of a title.

Yes, it is the plural form.

A large, energetic party.

It is a tradition to represent the years lived.

Yes, birth + day.

Yes, it marks the anniversary of its founding.

A math problem about the probability of shared birthdays.

Test Yourself

fill blank A1

Today is my ___.

Correct! Not quite. Correct answer: birthday

Birthday is the day you were born.

multiple choice A2

What do we usually put on a birthday cake?

Correct! Not quite. Correct answer: candles

Candles are traditional for birthdays.

true false B1

A birthday is the anniversary of the day you were born.

Correct! Not quite. Correct answer: True

This is the definition of a birthday.

match pairs B1

Word

Meaning

All matched!

Matching terms to their meanings.

sentence order B2

Tap words below to build the sentence
Correct! Not quite. Correct answer:

Correct sentence structure.

fill blank B2

He was born with a silver ___ in his mouth.

Correct! Not quite. Correct answer: spoon

The idiom is 'silver spoon'.

multiple choice C1

Which word is a synonym for birthday in a formal context?

Correct! Not quite. Correct answer: natal day

Natal day is a formal synonym.

true false C1

A birthday is only for people.

Correct! Not quite. Correct answer: False

Companies and organizations can also have birthdays.

match pairs C2

Word

Meaning

All matched!

Matching idioms to meanings.

sentence order C2

Tap words below to build the sentence
Correct! Not quite. Correct answer:

Complex sentence construction.

Score: /10

Related Content

More Time words

minute

A2

A unit of time that is equal to sixty seconds. It is used to measure short periods of time or to describe a specific point within an hour.

antetempful

C1

Describing an action, state, or mindset that occurs or is prepared significantly ahead of the expected or required time. It implies a proactive and anticipatory quality, often used to describe planning or behavior that preempts future needs.

Tuesday

A1

Tuesday is the third day of the week, positioned between Monday and Wednesday. In most Western cultures and business environments, it is regarded as the second day of the standard work week.

antactate

C1

Describing a condition, action, or state that occurs or is required prior to a primary event or process. It is frequently used in technical or academic contexts to denote necessary preparatory measures or antecedent conditions.

April

A1

April is the fourth month of the year in the Gregorian calendar, following March and preceding May. It has 30 days and is typically associated with the arrival of spring in the northern hemisphere.

prepaterent

C1

To become manifest, visible, or accessible before a specified time or a primary event. It is primarily used in specialized academic or technical contexts to describe the early appearance of signs, symptoms, or indicators.

period

B2

A length or portion of time that is defined by specific events, characteristics, or conditions. It can also refer to one of the divisions of a school day or a punctuation mark used at the end of a sentence.

lifetime

A1

A lifetime is the entire period of time that a person is alive. It can also refer to the length of time that an object, like a machine, works correctly.

hours

B1

A unit of time equal to 60 minutes or one twenty-fourth of a day. It is also commonly used to refer to a specific period or schedule allocated for work, business, or a particular activity.

punctual

A1

Being on time and not late. It describes a person who arrives or an action that happens at the exact scheduled time.

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