Birthday charts

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Every birthday

  • A heat map of every date in the United States: September is the deepest blue, the holidays around Christmas and New Year the deepest coral. September 9 is the most common birthday and December 25 the rarest.

    How common is your birthday?

    All 366 dates in one grid, from the most common birthday to the rarest.

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  • The twenty most common US birthdays as bars, led by September 9 at +9.7% against an average day; fifteen of them are in September.

    The 20 most common birthdays

    Fifteen of the twenty most common birthdays fall in September.

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  • The twenty rarest US birthdays as bars, from December 25 at −39.6% against an average day; seven of them are holidays and most of the rest fall in Thanksgiving week.

    The 20 rarest birthdays

    Christmas, New Year's Day and the Fourth of July lead the list, then Thanksgiving week.

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  • The twelve months as bars of births per day against an average day: September is the most common birth month and January the rarest.

    Birth months, ranked

    September has the most births per day, January the fewest.

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  • US births on an average day of the week: Tuesday has the most, about 11,628, and Sunday the fewest, about 7,838.

    Fewer babies are born on weekends

    An average Sunday sees 33% fewer births than an average Tuesday.

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  • Bars of US births every year from 1969 to 2024: the peak is 2007 with 4,316,233 births, the low 1973 with 3,145,670, and 2024 has 3,628,934.

    US births per year, 1969–2024

    The peak was 2007, with 4,316,233 births; 2024 had 3,628,934.

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  • Four figures: about 9,915 babies born in the United States on an average day of 2024, 413 an hour, 6.9 a minute, and about 362,000 a day worldwide.

    A baby every 8.7 seconds

    About 9,915 babies a day in the United States in 2024, and about 362,000 worldwide.

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  • A line of US births on an average weekend day as a share of an average weekday, from 88% in 1969 down to 61% in 2009, 68% in 2024.

    Weekend birthdays keep getting rarer

    A weekend day saw 88% of a weekday's births in 1969 and 68% in 2024.

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Holidays

  • US births on each fixed-date holiday against an average day: Christmas Day −39.6%, New Year's Day −28.7%, Christmas Eve −26.3%, Fourth of July −19.9%, Halloween −9.7%, Leap Day −8.7%, April Fools' Day −7.6%, New Year's Eve −6.4%, St. Patrick's Day −0.4%, Valentine's Day +3.5%.

    Most holidays are rare birthdays

    Every holiday with a fixed date, from Christmas Day to Valentine's Day.

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  • US births on each October date against an average day: October 1 is the most common at +4.4% and October 31 the rarest at −9.7%.

    Halloween is the rarest birthday in October

    October 31 is #356 of 366, 9.7% below an average day.

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  • US births on each day of Thanksgiving week against the same weekday in October and November: Monday +6.9%, Tuesday +4.5%, Wednesday −4.3%, Thanksgiving −38.2%, Black Friday −24.6%, Saturday −6.5%, Sunday −2.2%.

    Few babies are born on Thanksgiving

    38% fewer births on Thanksgiving than on other autumn Thursdays, and 25% fewer on Black Friday.

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  • US births on each date from December 15 to January 5 against an average day: Christmas Day −39.6%, Christmas Eve −26.3%, New Year's Day −28.7%, and December 28 +8.6%.

    The rarest birthdays fall around Christmas

    Christmas Day is the rarest birthday of the year, while December 28 is among the most common.

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  • Two lines of US births on Christmas Day and New Year's Day as a share of that year's average day, 1969 to 2024: Christmas went from 84% to a low of 52% in 2011 and 63% in 2024; New Year's Day ended at 65%.

    Christmas and New Year's Day, year by year

    Christmas Day births fell to 52% of an average day in 2011 and were back to 63% in 2024.

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  • US births on each date from February 7 to February 21 against an average day; Valentine's Day is +3.5%.

    Valentine's Day is a little busier than average

    February 14 is #94 of 366, +3.5% against an average day.

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  • US births on each date from February 22 to March 7, each measured per occurrence, against an average day; February 29 is −8.7%.

    How rare is a leap day birthday?

    Measured per leap day, February 29 is #353 of 366, 8.7% below an average day.

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  • US births on each date from June 27 to July 11 against an average day: the Fourth of July is −19.9% and July 7 +8.7%.

    Few babies are born on the Fourth of July

    July 4 is #363 of 366, while July 7 is #5.

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  • US births on each date from March 25 to April 8 against an average day; April 1 is −7.6%.

    April Fools' Day is a rare birthday

    April 1 is #352 of 366, 7.6% below an average day.

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  • US births on the 13th of the month against other days with the same weekday that year: Monday −1.0%, Tuesday −1.7%, Wednesday −1.9%, Thursday −1.7%, Friday −4.4%, Saturday −0.9%, Sunday −0.7%.

    Fewer babies are born on Friday the 13th

    4.4% fewer births than on other Fridays, against 1.6% for a 13th on a weekday.

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  • US births on each date from August 1 to October 31 against an average day, rising through August to a peak in mid-September (September 9, +9.7%) and easing through October.

    Birthday season peaks in September

    September 9 tops a slope that climbs through August and eases through October.

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Month by month

  • US births on each January date against an average day: January 4 is the most common at −0.3% and January 1 the rarest at −28.7%.

    The most common and rarest January birthdays

    January 4 is the most common January birthday (#179) and January 1 the rarest (#365).

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  • US births on each February date against an average day: February 14 is the most common at +3.5% and February 29 the rarest at −8.7%.

    The most common and rarest February birthdays

    February 14 is the most common February birthday (#94) and February 29 the rarest (#353).

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  • US births on each March date against an average day: March 1 is the most common at +0.6% and March 13 the rarest at −4.7%.

    The most common and rarest March birthdays

    March 1 is the most common March birthday (#147) and March 13 the rarest (#345).

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  • US births on each April date against an average day: April 4 is the most common at −0.2% and April 1 the rarest at −7.6%.

    The most common and rarest April birthdays

    April 4 is the most common April birthday (#177) and April 1 the rarest (#352).

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  • US births on each May date against an average day: May 24 is the most common at +2.4% and May 27 the rarest at −4.8%.

    The most common and rarest May birthdays

    May 24 is the most common May birthday (#105) and May 27 the rarest (#347).

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  • US births on each June date against an average day: June 28 is the most common at +4.4% and June 13 the rarest at −1.5%.

    The most common and rarest June birthdays

    June 28 is the most common June birthday (#73) and June 13 the rarest (#235).

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  • US births on each July date against an average day: July 7 is the most common at +8.7% and July 4 the rarest at −19.9%.

    The most common and rarest July birthdays

    July 7 is the most common July birthday (#5) and July 4 the rarest (#363).

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  • US births on each August date against an average day: August 16 is the most common at +7.0% and August 13 the rarest at +2.5%.

    The most common and rarest August birthdays

    August 16 is the most common August birthday (#16) and August 13 the rarest (#103).

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  • US births on each September date against an average day: September 9 is the most common at +9.7% and September 2 the rarest at −1.8%.

    The most common and rarest September birthdays

    September 9 is the most common September birthday (#1) and September 2 the rarest (#249).

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  • US births on each October date against an average day: October 1 is the most common at +4.4% and October 31 the rarest at −9.7%.

    The most common and rarest October birthdays

    October 1 is the most common October birthday (#71) and October 31 the rarest (#356).

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  • US births on each November date against an average day: November 1 is the most common at +2.6% and November 26 the rarest at −11.3%.

    The most common and rarest November birthdays

    November 1 is the most common November birthday (#102) and November 26 the rarest (#360).

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  • US births on each December date against an average day: December 28 is the most common at +8.6% and December 25 the rarest at −39.6%.

    The most common and rarest December birthdays

    December 28 is the most common December birthday (#6) and December 25 the rarest (#366).

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Signs and odds

  • A curve of the chance that two people in a group share a birthday, from US births: 50.8% with 23 people, 90.3% with 41 and 99.0% with 57.

    The birthday paradox, on real births

    In a room of 23, two people more likely than not share a birthday.

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  • Bars of how many people it takes for an even chance that someone shares a birthday: September 9 232, Any day 254, December 25 421, February 29 1,110.

    How many people until someone shares your birthday?

    232 people for September 9, 421 for December 25 and 1,110 for February 29.

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  • Each zodiac sign's share of US births: Cancer 9.03%, Virgo 8.95%, Leo 8.90%, Gemini 8.47%, Libra 8.39%, Taurus 8.34%, Scorpio 8.18%, Pisces 8.12%, Sagittarius 8.05%, Aquarius 8.03%, Aries 8.02%, Capricorn 7.50%.

    The most common and rarest zodiac signs

    Cancer has the largest share of births, Capricorn the smallest.

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Around the world

  • A table of 27 countries with each one's most common and rarest birthday: United States September 9 and December 25; Argentina January 3 and December 25; Brazil March 10 and December 25; Chile December 27 and December 25; Costa Rica September 19 and January 1; Ecuador February 14 and January 1; Guatemala September 20 and December 31; Mexico September 14 and December 25; Peru March 5 and December 25; Belgium July 23 and December 25; Denmark August 18 and December 24; England & Wales September 26 and December 26; Finland September 20 and December 25; France September 20 and December 25; Germany August 8 and December 25; Hungary July 25 and January 1; Ireland September 27 and December 26; Latvia June 19 and December 25; Netherlands September 24 and December 26; Norway June 28 and December 25; Portugal September 16 and December 25; Slovenia September 20 and November 1; Switzerland September 25 and December 25; Japan September 25 and January 1; Malaysia October 10 and December 25; New Zealand September 27 and December 25; Philippines September 8 and February 29.

    The most common birthday in 27 countries

    Each country's most common and rarest birthday, from its own official records.

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  • A heat map of every date across 27 countries, each country counted once: September is the deepest blue and the days around Christmas and New Year the deepest coral. September 20 is the most common birthday and December 25 the rarest.

    How common is your birthday around the world?

    Every date across 27 countries, each counted once: September 20 comes first, December 25 last.

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  • Births on December 25 against each country's average day, in 27 countries; it is the rarest birthday in 16 of them.

    Christmas Day around the world

    December 25 is the rarest birthday in 16 of 27 countries.

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Country by country

  • A heat map of every date in the United States, from NCHS, 1989–2024: September 9 is the most common birthday and December 25 the rarest.

    How common is your birthday in the United States?

    United States: September 9 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Argentina, from DEIS, 2018–2023: January 3 is the most common birthday and December 25 the rarest.

    How common is your birthday in Argentina?

    Argentina: January 3 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Brazil, from DATASUS, 1997–2024: March 10 is the most common birthday and December 25 the rarest.

    How common is your birthday in Brazil?

    Brazil: March 10 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Chile, from DEIS, 1990–2017: December 27 is the most common birthday and December 25 the rarest.

    How common is your birthday in Chile?

    Chile: December 27 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Costa Rica, from INEC Costa Rica, 2014–2024: September 19 is the most common birthday and January 1 the rarest.

    How common is your birthday in Costa Rica?

    Costa Rica: September 19 is the most common birthday, January 1 the rarest.

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  • A heat map of every date in Ecuador, from INEC, 2013–2023: February 14 is the most common birthday and January 1 the rarest.

    How common is your birthday in Ecuador?

    Ecuador: February 14 is the most common birthday, January 1 the rarest.

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  • A heat map of every date in Guatemala, from INE Guatemala, 2018–2024: September 20 is the most common birthday and December 31 the rarest.

    How common is your birthday in Guatemala?

    Guatemala: September 20 is the most common birthday, December 31 the rarest.

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  • A heat map of every date in Mexico, from INEGI, 2017–2023: September 14 is the most common birthday and December 25 the rarest.

    How common is your birthday in Mexico?

    Mexico: September 14 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Peru, from INEI, 2019–2025: March 5 is the most common birthday and December 25 the rarest.

    How common is your birthday in Peru?

    Peru: March 5 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Belgium, from Statbel, 1992–2025: July 23 is the most common birthday and December 25 the rarest.

    How common is your birthday in Belgium?

    Belgium: July 23 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Denmark, from Statistics Denmark, 2007–2025: August 18 is the most common birthday and December 24 the rarest.

    How common is your birthday in Denmark?

    Denmark: August 18 is the most common birthday, December 24 the rarest.

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  • A heat map of every date in England & Wales, from ONS, 1995–2025: September 26 is the most common birthday and December 26 the rarest.

    How common is your birthday in England & Wales?

    England & Wales: September 26 is the most common birthday, December 26 the rarest.

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  • A heat map of every date in Finland, from Statistics Finland, 2010–2025: September 20 is the most common birthday and December 25 the rarest.

    How common is your birthday in Finland?

    Finland: September 20 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in France, from INSEE, 1998–2024: September 20 is the most common birthday and December 25 the rarest.

    How common is your birthday in France?

    France: September 20 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Germany, from Destatis, 2014–2025: August 8 is the most common birthday and December 25 the rarest.

    How common is your birthday in Germany?

    Germany: August 8 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Hungary, from KSH, 1970–2020: July 25 is the most common birthday and January 1 the rarest.

    How common is your birthday in Hungary?

    Hungary: July 25 is the most common birthday, January 1 the rarest.

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  • A heat map of every date in Ireland, from CSO, 1980–2023: September 27 is the most common birthday and December 26 the rarest.

    How common is your birthday in Ireland?

    Ireland: September 27 is the most common birthday, December 26 the rarest.

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  • A heat map of every date in Latvia, from CSB, 1996–2025: June 19 is the most common birthday and December 25 the rarest.

    How common is your birthday in Latvia?

    Latvia: June 19 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in the Netherlands, from CBS, 1995–2025: September 24 is the most common birthday and December 26 the rarest.

    How common is your birthday in the Netherlands?

    Netherlands: September 24 is the most common birthday, December 26 the rarest.

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  • A heat map of every date in Norway, from SSB, 2011–2025: June 28 is the most common birthday and December 25 the rarest.

    How common is your birthday in Norway?

    Norway: June 28 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Portugal, from INE Portugal, 1980–2025: September 16 is the most common birthday and December 25 the rarest.

    How common is your birthday in Portugal?

    Portugal: September 16 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Slovenia, from SURS, 2000–2025: September 20 is the most common birthday and November 1 the rarest.

    How common is your birthday in Slovenia?

    Slovenia: September 20 is the most common birthday, November 1 the rarest.

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  • A heat map of every date in Switzerland, from FSO, 1969–2025: September 25 is the most common birthday and December 25 the rarest.

    How common is your birthday in Switzerland?

    Switzerland: September 25 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in Japan, from e-Stat, 1996–2025: September 25 is the most common birthday and January 1 the rarest.

    How common is your birthday in Japan?

    Japan: September 25 is the most common birthday, January 1 the rarest.

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  • A heat map of every date in Malaysia, from DOSM, 2000–2022: October 10 is the most common birthday and December 25 the rarest.

    How common is your birthday in Malaysia?

    Malaysia: October 10 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in New Zealand, from Stats NZ, 1980–2023: September 27 is the most common birthday and December 25 the rarest.

    How common is your birthday in New Zealand?

    New Zealand: September 27 is the most common birthday, December 25 the rarest.

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  • A heat map of every date in the Philippines, from PSA, 2006–2024: September 8 is the most common birthday and February 29 the rarest.

    How common is your birthday in the Philippines?

    Philippines: September 8 is the most common birthday, February 29 the rarest.

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