Is May 31 a rare birthday? Uncommon
Rarer than 79% of all 366 dates.
May 31 in numbers
The odds, the star sign and the other dates that come with it.
Where May 31 ranks
From most common birthday to rarest, May 31 ranks in position #290, with 10,555 births a year. 289 other dates are more common. 84 dates are within 1% of its count, anywhere from #245 to #329, so the exact position is a close thing.
May 31 through the years
Where it ranked in the United States, year by year.
common
May 31 in other countries
May 31 is the 77th rarest birthday in the United States. It is among the 50 rarest in 2 of the 26 other countries, and ranges from #15 in Norway to #329 in Chile.
Norway
#15 of 366
172 births on an average May 31
SSB, 2011–2025Finland
#26 of 366
150 births on an average May 31
Statistics Finland, 2010–2025Slovenia
#109 of 366
55 births on an average May 31
SURS, 2000–2025Denmark
#132 of 366
168 births on an average May 31
Statistics Denmark, 2007–2025Argentina
#148 of 366
1,543 births on an average May 31
DEIS, 2018–2023Brazil
#172 of 366
8,041 births on an average May 31
DATASUS, 1997–2024Latvia
#176 of 366
54 births on an average May 31
CSB, 1996–2025Germany
#183 of 366
2,012 births on an average May 31
Destatis, 2014–2025Malaysia
#194 of 366
1,392 births on an average May 31
DOSM, 2000–2022Ireland
#199 of 366
167 births on an average May 31
CSO, 1980–2023England & Wales
#210 of 366
1,774 births on an average May 31
ONS, 1995–2025Netherlands
#223 of 366
492 births on an average May 31
CBS, 1995–2025Guatemala
#229 of 366
935 births on an average May 31
INE Guatemala, 2018–2024France
#233 of 366
2,123 births on an average May 31
INSEE, 1998–2024New Zealand
#245 of 366
156 births on an average May 31
Stats NZ, 1980–2023Ecuador
#249 of 366
748 births on an average May 31
INEC, 2013–2023Portugal
#260 of 366
291 births on an average May 31
INE Portugal, 1980–2025Costa Rica
#263 of 366
163 births on an average May 31
INEC Costa Rica, 2014–2024Peru
#266 of 366
1,160 births on an average May 31
INEI, 2019–2025Hungary
#268 of 366
319 births on an average May 31
KSH, 1970–2020Switzerland
#281 of 366
216 births on an average May 31
FSO, 1969–2025Mexico
#296 of 366
4,779 births on an average May 31
INEGI, 2017–2023Belgium
#308 of 366
316 births on an average May 31
Statbel, 1992–2025Philippines
#314 of 366
4,174 births on an average May 31
PSA, 2006–2024Japan
#318 of 366
2,679 births on an average May 31
e-Stat, 1996–2025Chile
#329 of 366
666 births on an average May 31
DEIS, 1990–2017
Famous people born on May 31
Ranked by how often people looked them up on Wikipedia last year.
Clint EastwoodAmerican actor and filmmaker · born 1930
Iga ŚwiątekPolish tennis player · born 2001
Colin FarrellIrish actor · born 1976
Brooke ShieldsAmerican actress · born 1965
John BonhamEnglish drummer · born 1948
Viktor OrbánPrime Minister of Hungary (1998–2002, 2010–2026) · born 1963
Lea ThompsonAmerican actress and director · born 1961
Archie PanjabiBritish actress · born 1972May against the other eleven
May 31 is the 7th rarest of the 31 days in May. All May birthdays.
May is the 6th most common month of the year
An average May day sees 10,702 births in the United States. September is the busiest month, January the quietest.
Quick answers
How many babies are born on May 31?
About 10,555 a year in the United States. It was at its most common in 1995, when 12,393 babies were born and it ranked #38 of 365; at its rarest in 1970, with 8,388 births at #358.
Is May 31 a common birthday?
In the United States, May 31 is the 77th rarest of 366 dates, with about 10,555 births a year. That puts it on the rarer side of the calendar.
What is the rarest May birthday?
In the United States, May 27: the 20th rarest of all 366 dates, with about 10,322 births a year. The most common May birthday is May 24, the 105th most common of the year.
How precise is the ranking?
In the middle of the calendar it is not exact. 84 other dates are within 1% of May 31's count, spread from #245 to #329, 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 May 31 rarer in other countries?
In some. It is rarer in 5 of the 26 other countries we hold daily records for. It is at its rarest in Chile, at #329 of 366, and at its most common in Norway, at #15.
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.
Updated October 2026