Is December 21 a rare birthday? Popular
More common than 92% of all 366 dates.
December 21 in numbers
The odds, the star sign and the other dates that come with it.
Where December 21 ranks
From most common birthday to rarest, December 21 ranks in position #29, with 11,521 births a year. 337 other dates are rarer. 34 dates are within 1% of its count, anywhere from #14 to #48, so the exact position is a close thing.
December 21 through the years
Where it ranked in the United States, year by year.
common
December 21 in other countries
December 21 is the 29th most common birthday in the United States. It is among the 50 most common in 4 of the 26 other countries, and ranges from #22 in Chile to #337 in Norway.
Chile
#22 of 366
738 births on an average December 21
DEIS, 1990–2017Argentina
#28 of 366
1,722 births on an average December 21
DEIS, 2018–2023New Zealand
#31 of 366
164 births on an average December 21
Stats NZ, 1980–2023Ireland
#40 of 366
174 births on an average December 21
CSO, 1980–2023Mexico
#59 of 366
5,429 births on an average December 21
INEGI, 2017–2023Japan
#97 of 366
2,855 births on an average December 21
e-Stat, 1996–2025Costa Rica
#113 of 366
172 births on an average December 21
INEC Costa Rica, 2014–2024Portugal
#128 of 366
301 births on an average December 21
INE Portugal, 1980–2025England & Wales
#130 of 366
1,805 births on an average December 21
ONS, 1995–2025Philippines
#130 of 366
4,587 births on an average December 21
PSA, 2006–2024Brazil
#177 of 366
8,030 births on an average December 21
DATASUS, 1997–2024France
#178 of 366
2,150 births on an average December 21
INSEE, 1998–2024Belgium
#190 of 366
326 births on an average December 21
Statbel, 1992–2025Slovenia
#215 of 366
52 births on an average December 21
SURS, 2000–2025Latvia
#256 of 366
52 births on an average December 21
CSB, 1996–2025Netherlands
#259 of 366
489 births on an average December 21
CBS, 1995–2025Malaysia
#262 of 366
1,374 births on an average December 21
DOSM, 2000–2022Hungary
#275 of 366
318 births on an average December 21
KSH, 1970–2020Denmark
#284 of 366
159 births on an average December 21
Statistics Denmark, 2007–2025Guatemala
#305 of 366
910 births on an average December 21
INE Guatemala, 2018–2024Germany
#306 of 366
1,928 births on an average December 21
Destatis, 2014–2025Switzerland
#309 of 366
210 births on an average December 21
FSO, 1969–2025Ecuador
#314 of 366
720 births on an average December 21
INEC, 2013–2023Peru
#326 of 366
1,123 births on an average December 21
INEI, 2019–2025Finland
#336 of 366
131 births on an average December 21
Statistics Finland, 2010–2025Norway
#337 of 366
133 births on an average December 21
SSB, 2011–2025
Famous people born on December 21
Ranked by how often people looked them up on Wikipedia last year.
Emmanuel MacronPresident of France since 2017 · born 1977
Kaitlyn DeverAmerican actress · born 1996
Cooper FlaggAmerican basketball player · born 2006
Jane FondaAmerican actress and activist · born 1937
Samuel L. JacksonAmerican actor · born 1948
Kiefer SutherlandBritish and Canadian actor · born 1966
Tamannaah BhatiaIndian actress · born 1989
Madelyn ClineAmerican actress · born 1997December against the other eleven
December 21 is the 4th most common of the 31 days in December. All December birthdays.
December is the 4th rarest month of the year
An average December day sees 10,633 births in the United States. September is the busiest month, January the quietest.
Quick answers
How many babies are born on December 21?
About 11,521 a year in the United States. It was at its most common in 1999, when 13,508 babies were born and it ranked #2 of 365; at its rarest in 1986, with 8,146 births at #360.
Is December 21 a common birthday?
In the United States, December 21 is the 29th most common of 366 dates, with about 11,521 births a year. That puts it among the more common birthdays.
What is the rarest December birthday?
In the United States, December 25: the rarest of all 366 dates, with about 6,546 births a year. The most common December birthday is December 28, the 6th most common of the year.
How precise is the ranking?
In the middle of the calendar it is not exact. 34 other dates are within 1% of December 21's count, spread from #14 to #48, 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 December 21 rarer in other countries?
In some. It is rarer in 24 of the 26 other countries we hold daily records for. It is at its rarest in Norway, at #337 of 366, and at its most common in Chile, at #22.
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