born in (on) 10th of June

Writers often mix up in, on, and at when giving birth dates-e.g., "born in 10th of June" is a frequent error. Below are clear rules, many copy-ready wrong/right pairs, rewrite templates, and workplace, school, and casual examples you can use.

Quick answer

Use "born on" for specific calendar days (day + month or day + month + year). Use "born in" for months, years, decades, centuries, or regions. Use "born at" for clock times and very precise locations.

"Born on March 3" or "born on the 3rd of March" → on = specific day.
"Born in March" or "born in 1990" or "born in the 1990s" → in = span (month/year/decade).
"Born at 3:15 a.m." or "born at St Mary's Hospital" → at = time or pinpoint place.

Core explanation: on vs in vs at (short)

If the date includes a day number (1-31), use on. If it gives only a month, year, decade, or century, use in. If it gives a clock time or an exact building/address, use at.

On: born on June 10 / born on the 10th of June.
In: born in June / born in 1990 / born in the 1990s.
At: born at 7:45 a.m. / born at St Thomas' Hospital.

Grammar details and edge cases

Use "the" with ordinals: "the 3rd of March." You can write "March 3" without "the." For month + year, use in (Born in May 1995). For day + month + year, use on (Born on May 5, 1995).

For places, use in for cities and countries (born in London) and at for a named building or precise address (born at St Mary's Hospital).

Correct: born on the 10th of June / born on June 10.
Correct: born in May 1995 / born in 1995.
Correct: born in Brazil / born at St Mary's Hospital.

Real usage: formal vs casual and regional notes

Formal contexts (CVs, bios): prefer "Born in 1985" for years and "Born on 3 March 1985" for full dates. In short parentheticals use "b. 1985."

Casual speech and social posts often shorten dates: "Born July 7" (US) or "Born 7 July" (UK). Whatever the order, the preposition rule stays the same.

Resume: Jane Doe (b. 1988) - no preposition needed.
Formal bio: John Smith, born on 12 March 1976, is the CEO.
Casual chat: "When's your birthday?" - "On June 10." or "In June." depending on specificity.

Examples: common wrong/right pairs (copy-ready)

Frequent mistakes followed by corrected sentences. Copy any "Right" line or adapt the rewrites later in the page.

Wrong: She was born in 10th of June.
Right: She was born on the 10th of June.
Wrong: He was born on 1990.
Right: He was born in 1990.
Wrong: I was born on June.
Right: I was born in June.
Wrong: Born on April 1985, John joined our firm.
Right: Born in April 1985, John joined our firm.
Wrong: Employee born on 1992 has ten years' experience.
Right: Employee born in 1992 has ten years' experience.
Wrong: Maria was born in 3rd of March.
Right: Maria was born on the 3rd of March.
Wrong: Student born on May 2005 transferred schools.
Right: Student born in May 2005 transferred schools.
Wrong: I was born in 7 July.
Right: I was born on 7 July.
Wrong: Born at June 1990 - is that correct?
Right: Born in June 1990.
Wrong: She was born into 1990.
Right: She was born in 1990.
Usage: The baby was born at 3:15 a.m. (correct time example).
Usage: He was born in Manchester (city) but born at St Mary's (hospital).

Try your own sentence

Read the whole sentence, not just the phrase. Context usually makes the correct choice obvious: day → on, month/year/decade → in, time/place → at.

Fix your own sentence: quick rewrite templates and diagnostics

Checklist: 1) Day number present? → use on. 2) Only month/year/decade/century? → use in. 3) Clock time or specific building/address? → use at.

Day (day + month): "She was born on [day] [month]" - e.g., "She was born on 12 August."
Day + year: "He was born on [month] [day], [year]" - e.g., "He was born on May 5, 1995."
Month or year: "They were born in [month/year/decade]" - e.g., "They were born in June." / "They were born in 1995."
Time/place: "The baby was born at [time]" or "She was born at [hospital/address]" - e.g., "The baby was born at 2:35 p.m."

Rewrite:
Original: "Born in June 10." → "Born on June 10."
Rewrite:
Original: "She was born 1990." → "She was born in 1990."
Rewrite:
Original: "He was born on the 90s." → "He was born in the 90s."
Rewrite:
Original: "Born at May 1995." → "Born in May 1995."
Rewrite:
Original: "Born in St Mary's at 3am." → "Born at St Mary's at 3 a.m."
Rewrite:
Original: "Born May 1990, she moved to NY." →
Formal: "Born in May 1990, she moved to New York."

Memory trick: simple image to keep it straight

Think in terms of scale: on = pinpoint (a single day), in = container (month/year/decade), at = point on a clock or a precise spot.

Visualize a calendar square: "on" sticks to the square, "in" fills the month box, "at" points to the clock.

"On" = a square/day. "In" = inside month/year. "At" = specific time/place point.
If you see a day number with a month → ask "Is this a single day?" If yes → on.

Similar mistakes and quick fixes

"Born into" is not a date preposition - it describes circumstances or family (born into wealth or born into a musical family).

Place confusion: use in for cities/countries and at for named buildings/addresses.

"Born into" = circumstances (born into a musical family).
"Born in" = country/city (born in Canada, born in Osaka).
"Born at" = hospital or exact location (born at St Thomas' Hospital; born at 221B Baker Street).

Wrong: She was born into London.
Right: She was born in London.
Wrong: He was born in St Mary's Hospital.
Right: He was born at St Mary's Hospital.

Hyphenation, spacing and punctuation (practical rules)

Do not hyphenate a preposition and a date. Hyphens belong in compound adjectives like "10-year-old." Write ordinals without a space ("10th", not "10 th").

Slashed dates (7/7) are fine informally; spell out "July 7" in formal writing and use "on."

Correct compound adjective: "a 10-year-old graduate." Incorrect: "born-on-10th."
Correct ordinal: "the 10th of June" (no space in "10th").
Casual: "born 7/7" OK;
formal: "born on July 7."

FAQ

Should I write "born in 10th June" or "born on 10th June"?

Write "born on 10th June." A specific day needs "on." If you only give a month or year use "in": "born in June" or "born in 1990."

Is "born at June" ever correct?

No. Use "in June" for months. Use "at" only for precise clock times ("born at 3 a.m.") or very specific locations ("born at St Mary's").

On a CV should I list "born in 1988" or "born on May 5, 1988"?

Prefer "Born in 1988" or the compact "(b. 1988)". Use "born on" only when you include the full date and it matters.

Which preposition for decades: "born on the 80s" or "born in the 80s"?

"Born in the 80s" is correct. Use "in" for decades, centuries and years.

I wrote "Born on May 1995" - how do I fix it?

When you have month + year use "in": "Born in May 1995." Use "on" only when a specific day is included: "Born on May 5, 1995."

Still unsure about one sentence?

Use the checklist above: day → on, month/year/decade → in, time/spot → at. Paste your sentence into a grammar tool for a quick correction and a short explanation to help you learn.