30th birthday
10
1.0
- noun
:
cumpleaños número treinta
- I slept in there on my 30th birthday.
- celebrate 30th birthday
- 30th birthday party
- reach their 30th birthday
Examples
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Recently, on his 30th birthday, Eric wanted to give something precious away.
Fiction book (1999) -
I was gonna do it on my 30th birthday.
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Your 30th birthday is just around the corner!
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Do you know what I want for my 30th birthday?
Fiction book (1999) -
My actual 30th birthday was so simple and beautiful, just like I've always imagined it.
Blog text (5) -
One of the other artists gave my husband a colored pencil portrait of John Wayne for his 30th birthday.
Blog text (21) -
Curtiss celebrated his 30th birthday on May 21 with his first flight for a distance of 1,000 feet.
Academic text (2003) -
Invited to join Peter's 30th birthday celebration, complete with a giant banana cake.
Blog text (22) -
On the eve of his 30th birthday, an L.A. man reconnects with his intense ex-boyfriend.
Blog text (5) -
I celebrated my 30th birthday with a big party and lots of friends.
How Old
Surface Forms
Morphology
The meaning is directly and transparently derived from combining the ordinal '30th' (the position following the twenty-ninth) with 'birthday' (the anniversary of birth); a B1 learner who knows both constituents can infer it denotes the thirtieth anniversary. This ordinal + event construction is cross-linguistically common and follows regular compositional patterns, so the phrase is immediately comprehensible without prior exposure.
Etymology
30Th birthday simply names the day you 'turn thirty'. People often see it as an important milestone or a clear marker on the road from your twenties into a new decade, so the day feels like a special point in life.