Is September 13 a rare birthday? Popular

More common than 95% of all 366 dates.

September 13 #20
Most commonSeptember 9RarestDecember 25
Cartoon birthday scene for September 13: a child behind a cake whose candles spell the date
At a glance

September 13 in numbers

The odds, the star sign and the other dates that come with it.

Born each year≈ 11,562in the United States — about 989,000 of them are alive today
In a full stadium146 peopleof 50,000 were born on September 13
On the day itselfEvery 7 secondsa baby is born on September 13 somewhere in the United States
Star signVirgomore common than 17 of the 31 Virgo birthdays
Half-birthdayMarch 13six months later, to the day
Conceived aroundDecember 21Right around Christmas Eve.
Birth frequency by rank

Where September 13 ranks

From most common birthday to rarest, September 13 ranks in position #20, with 11,562 births a year. 346 other dates are rarer. 27 dates are within 1% of its count, anywhere from #13 to #40, so the exact position is a close thing.

56 years of records

September 13 through the years

Where it ranked in the United States, year by year.

Fell on a weekdayOn a weekend
rarestmost
common
1969, Saturday: rank #254 of 365, 9,534 births1970, Sunday: rank #286 of 365, 9,544 births1971, Monday: rank #48 of 365, 10,582 births1972, Wednesday: rank #28 of 366, 9,794 births1973, Thursday: rank #88 of 365, 9,106 births1974, Friday: rank #22 of 365, 9,868 births1975, Saturday: rank #262 of 365, 8,310 births1976, Monday: rank #37 of 366, 9,641 births1977, Tuesday: rank #24 of 365, 10,177 births1978, Wednesday: rank #42 of 365, 10,170 births1979, Thursday: rank #38 of 365, 10,685 births1980, Saturday: rank #249 of 366, 9,673 births1981, Sunday: rank #266 of 365, 9,396 births1982, Monday: rank #29 of 365, 11,343 births1983, Tuesday: rank #9 of 365, 11,216 births1984, Thursday: rank #24 of 366, 11,515 births1985, Friday: rank #65 of 365, 11,330 births1986, Saturday: rank #257 of 365, 9,596 births1987, Sunday: rank #279 of 365, 9,024 births1988, Tuesday: rank #11 of 366, 12,451 births1989, Wednesday: rank #25 of 365, 12,759 births1990, Thursday: rank #60 of 365, 12,688 births1991, Friday: rank #74 of 365, 12,450 births1992, Sunday: rank #299 of 366, 9,198 births1993, Monday: rank #148 of 365, 11,807 births1994, Tuesday: rank #23 of 365, 12,560 births1995, Wednesday: rank #63 of 365, 12,173 births1996, Friday: rank #74 of 366, 12,019 births1997, Saturday: rank #263 of 365, 9,053 births1998, Sunday: rank #302 of 365, 8,434 births1999, Monday: rank #214 of 365, 11,481 births2000, Wednesday: rank #35 of 366, 12,965 births2001, Thursday: rank #50 of 365, 12,857 births2002, Friday: rank #61 of 365, 12,786 births2003, Saturday: rank #255 of 365, 9,444 births2004, Monday: rank #173 of 366, 12,437 births2005, Tuesday: rank #28 of 365, 13,673 births2006, Wednesday: rank #16 of 365, 14,467 births2007, Thursday: rank #33 of 365, 14,292 births2008, Saturday: rank #255 of 366, 9,446 births2009, Sunday: rank #309 of 365, 7,754 births2010, Monday: rank #131 of 365, 12,418 births2011, Tuesday: rank #39 of 365, 12,978 births2012, Thursday: rank #18 of 366, 13,235 births2013, Friday: rank #68 of 365, 12,493 births2014, Saturday: rank #261 of 365, 8,862 births2015, Sunday: rank #311 of 365, 7,900 births2016, Tuesday: rank #14 of 366, 13,004 births2017, Wednesday: rank #25 of 365, 12,662 births2018, Thursday: rank #10 of 365, 12,575 births2019, Friday: rank #36 of 365, 12,183 births2020, Sunday: rank #307 of 366, 7,239 births2021, Monday: rank #80 of 365, 11,546 births2022, Tuesday: rank #92 of 365, 11,386 births2023, Wednesday: rank #29 of 365, 11,602 births2024, Friday: rank #61 of 366, 11,404 births1970198019902000201020202024

On a weekend it slips to #276, from #54 on a working day

Inductions and planned caesareans are booked on working days, so 25.3% fewer babies arrive and the date falls down the ranking. Each bar is the average rank of the years it landed on that day.

#108
Mon
#30
Tue
#33
Wed
#40
Thu
#58
Fri
#257
Sat
#295
Sun
Most common year
1983#9 of 365Tuesday · 11,216 births
Rarest year
2015#311 of 365Sunday · 7,900 births
Weekend years
16 of 5629% of the record2020 was the most recent
Around the world

September 13 in other countries

September 13 is the 20th most common birthday in the United States. It is among the 50 most common in 10 of the 26 other countries, and ranges from #8 in Mexico to #246 in Latvia.

  1. Mexico

    #8 of 366

    5,947 births on an average September 13

    INEGI, 2017–⁠2023
  2. Chile

    #9 of 366

    779 births on an average September 13

    DEIS, 1990–⁠2017
  3. Guatemala

    #10 of 366

    1,070 births on an average September 13

    INE Guatemala, 2018–⁠2024
  4. Malaysia

    #21 of 366

    1,493 births on an average September 13

    DOSM, 2000–⁠2022
  5. Philippines

    #26 of 366

    5,137 births on an average September 13

    PSA, 2006–⁠2024
  6. Portugal

    #37 of 366

    310 births on an average September 13

    INE Portugal, 1980–⁠2025
  7. Japan

    #38 of 366

    2,937 births on an average September 13

    e-Stat, 1996–⁠2025
  8. Hungary

    #43 of 366

    345 births on an average September 13

    KSH, 1970–⁠2020
  9. England & Wales

    #45 of 366

    1,839 births on an average September 13

    ONS, 1995–⁠2025
  10. Costa Rica

    #47 of 366

    178 births on an average September 13

    INEC Costa Rica, 2014–⁠2024
  11. Netherlands

    #52 of 366

    524 births on an average September 13

    CBS, 1995–⁠2025
  12. Finland

    #58 of 366

    148 births on an average September 13

    Statistics Finland, 2010–⁠2025
  13. New Zealand

    #58 of 366

    162 births on an average September 13

    Stats NZ, 1980–⁠2023
  14. Germany

    #76 of 366

    2,170 births on an average September 13

    Destatis, 2014–⁠2025
  15. Ecuador

    #81 of 366

    789 births on an average September 13

    INEC, 2013–⁠2023
  16. Slovenia

    #83 of 366

    56 births on an average September 13

    SURS, 2000–⁠2025
  17. France

    #89 of 366

    2,200 births on an average September 13

    INSEE, 1998–⁠2024
  18. Denmark

    #113 of 366

    170 births on an average September 13

    Statistics Denmark, 2007–⁠2025
  19. Belgium

    #140 of 366

    330 births on an average September 13

    Statbel, 1992–⁠2025
  20. Norway

    #146 of 366

    160 births on an average September 13

    SSB, 2011–⁠2025
  21. Ireland

    #151 of 366

    169 births on an average September 13

    CSO, 1980–⁠2023
  22. Switzerland

    #192 of 366

    223 births on an average September 13

    FSO, 1969–⁠2025
  23. Brazil

    #197 of 366

    7,939 births on an average September 13

    DATASUS, 1997–⁠2024
  24. Argentina

    #213 of 366

    1,483 births on an average September 13

    DEIS, 2018–⁠2023
  25. Peru

    #215 of 366

    1,188 births on an average September 13

    INEI, 2019–⁠2025
  26. Latvia

    #246 of 366

    52 births on an average September 13

    CSB, 1996–⁠2025
Zoom out

September against the other eleven

September 13 is the 15th most common of the 30 days in September. All September birthdays.

September is the most common month of the year

An average September day sees 11,448 births in the United States. September is the busiest month, January the quietest.

September 13 is the 4th rarest of the 15 days around it

The whole year

Every date on one grid

In the United States, September is the busiest month of the year to be born in and January the quietest.

Each square is one date

September 13#20 of 36611,562 births a year

JanJFebFMarMAprAMayMJunJJulJAugASepSOctONovNDecD151015202530
RarestMost common

Compare with a friend

See how September 13 stacks up against someone else's birthday.

YouSeptember 13
#20Rank
11,562Births a year
Friend
Questions

Quick answers

How many babies are born on September 13?

About 11,562 a year in the United States. It was at its most common in 1983, when 11,216 babies were born and it ranked #9 of 365; at its rarest in 2015, with 7,900 births at #311.

Is September 13 a common birthday?

In the United States, September 13 is the 20th most common of 366 dates, with about 11,562 births a year. That puts it among the more common birthdays.

What is the rarest September birthday?

In the United States, September 2: the 118th rarest of all 366 dates, with about 10,653 births a year. The most common September birthday is September 9, the most common of the year.

How precise is the ranking?

In the middle of the calendar it is not exact. 27 other dates are within 1% of September 13's count, spread from #13 to #40, so the position inside that group would shift with a different set of years. That band is the accurate answer; the rank is the simple one. At the ends — Christmas Day, New Year's Day — nothing is close.

Is September 13 rarer in other countries?

In some. It is rarer in 23 of the 26 other countries we hold daily records for. It is at its rarest in Latvia, at #246 of 366, and at its most common in Mexico, at #8.

Our data

How this is counted

Every date is ranked by how many babies are born on it in the United States. Live births by day of birth from the CDC's National Center for Health Statistics, 1989–⁠2024.

Read the full methodology →

Updated October 2026