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📖
Featured Word B2

birthday (noun)

A birthday is the annual anniversary of the day a person was born, often celebrated as a milestone of aging. In academic and legal contexts, it is the standard reference point for determining a person's age, legal capacity, and eligibility for certain rights or obligations.

💬 Example

"I am planning to bake a chocolate cake for my sister's twenty-first birthday."

💡 Memory Tip

Think of 'Birth' (the start) + 'Day' (the time). It's the 'Day' of your 'Birth' anniversary.

🏛️ Origin

🔗 Synonyms
anniversary date of birth natal day DOB name day
⚠️ Common Mistakes

Happy wedding birthday! → Happy wedding anniversary!

I am in my birthday. → It is my birthday. / I am celebrating my birthday.