Is March 31 a rare birthday? Uncommon
Rarer than 85% of all 366 dates.
March 31 in numbers
The odds, the star sign and the other dates that come with it.
Where March 31 ranks
From most common birthday to rarest, March 31 ranks in position #312, with 10,496 births a year. 311 other dates are more common. 59 dates are within 1% of its count, anywhere from #276 to #335, so the exact position is a close thing.
March 31 through the years
Where it ranked in the United States, year by year.
common
March 31 in other countries
March 31 is the 55th rarest birthday in the United States. It is among the 50 rarest in 8 of the 26 other countries, and ranges from #21 in Peru to #362 in the Philippines.
Peru
#21 of 366
1,280 births on an average March 31
INEI, 2019–2025New Zealand
#78 of 366
160 births on an average March 31
Stats NZ, 1980–2023Brazil
#85 of 366
8,430 births on an average March 31
DATASUS, 1997–2024Belgium
#101 of 366
333 births on an average March 31
Statbel, 1992–2025Finland
#118 of 366
145 births on an average March 31
Statistics Finland, 2010–2025Ireland
#150 of 366
169 births on an average March 31
CSO, 1980–2023Switzerland
#168 of 366
224 births on an average March 31
FSO, 1969–2025Denmark
#180 of 366
165 births on an average March 31
Statistics Denmark, 2007–2025Latvia
#180 of 366
54 births on an average March 31
CSB, 1996–2025Costa Rica
#196 of 366
166 births on an average March 31
INEC Costa Rica, 2014–2024Argentina
#233 of 366
1,468 births on an average March 31
DEIS, 2018–2023Ecuador
#237 of 366
752 births on an average March 31
INEC, 2013–2023Slovenia
#253 of 366
51 births on an average March 31
SURS, 2000–2025Hungary
#271 of 366
319 births on an average March 31
KSH, 1970–2020Norway
#277 of 366
147 births on an average March 31
SSB, 2011–2025Netherlands
#287 of 366
486 births on an average March 31
CBS, 1995–2025Chile
#289 of 366
676 births on an average March 31
DEIS, 1990–2017Malaysia
#316 of 366
1,351 births on an average March 31
DOSM, 2000–2022Germany
#318 of 366
1,922 births on an average March 31
Destatis, 2014–2025England & Wales
#330 of 366
1,739 births on an average March 31
ONS, 1995–2025France
#341 of 366
2,051 births on an average March 31
INSEE, 1998–2024Japan
#349 of 366
2,404 births on an average March 31
e-Stat, 1996–2025Portugal
#349 of 366
278 births on an average March 31
INE Portugal, 1980–2025Mexico
#352 of 366
4,533 births on an average March 31
INEGI, 2017–2023Guatemala
#358 of 366
828 births on an average March 31
INE Guatemala, 2018–2024Philippines
#362 of 366
3,970 births on an average March 31
PSA, 2006–2024
Famous people born on March 31
Ranked by how often people looked them up on Wikipedia last year.
Ewan McGregorScottish actor · born 1971
Christopher WalkenAmerican actor · born 1943
Richard ChamberlainAmerican actor and singer · born 1934
Al GoreVice President of the United States from 1993 to 2001 · born 1948
Rhea PerlmanAmerican actress · born 1948
Angus YoungAustralian musician; lead guitarist of AC/DC · born 1955
Johann Sebastian BachGerman composer · born 1685
William DanielsAmerican actor · born 1927March against the other eleven
March 31 is the 2nd rarest of the 31 days in March. All March birthdays.
March is the 6th rarest month of the year
An average March day sees 10,658 births in the United States. September is the busiest month, January the quietest.
Quick answers
How many babies are born on March 31?
About 10,496 a year in the United States. It was at its most common in 2015, when 12,362 babies were born and it ranked #88 of 365; at its rarest in 2024, with 6,242 births at #365.
Is March 31 a common birthday?
In the United States, March 31 is the 55th rarest of 366 dates, with about 10,496 births a year. That puts it on the rarer side of the calendar.
What is the rarest March birthday?
In the United States, March 13: the 22nd rarest of all 366 dates, with about 10,340 births a year. The most common March birthday is March 1, the 147th most common of the year.
How precise is the ranking?
In the middle of the calendar it is not exact. 59 other dates are within 1% of March 31's count, spread from #276 to #335, 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 March 31 rarer in other countries?
In some. It is rarer in 9 of the 26 other countries we hold daily records for. It is at its rarest in the Philippines, at #362 of 366, and at its most common in Peru, at #21.
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