What was the most common birthday in 2010?

Published by Birthday Traffic · September 15, 2026 · Sources and method

December 21most births in 2010a Tuesday, 14,255 births
December 25fewest births in 2010a Saturday, 6,159 births
Septemberbusiest month per day11,863 births per day
Tuesdaybusiest weekday13,034 per day against 7,184 on Sunday

In 2010 the United States recorded 4,055,975 births over 365 days, 11,112 on an average day. The busiest single date was December 21, a Tuesday, with 14,255 births; the quietest was December 25, a Saturday, with 6,159. Within one year every date has one weekday, so the weekday column below is a fact of that date.

Every day of 2010: recorded U.S. births

Every day of 2010 in calendar order as one line, with the busiest and quietest dates marked and the year’s average day drawn across it.

The regular dips are weekends. The deepest dips are fixed holidays.

The busiest dates of 2010

Dates of 2010 with the most recorded U.S. births
Date	Weekday	Births	% of an average day
December 21	Tuesday	14,255	128.3
September 8	Wednesday	14,239	128.1
September 9	Thursday	14,135	127.2
September 16	Thursday	13,964	125.7
September 14	Tuesday	13,949	125.5
July 7	Wednesday	13,940	125.4
September 21	Tuesday	13,919	125.3
September 15	Wednesday	13,893	125.0
June 2	Wednesday	13,812	124.3
November 23	Tuesday	13,762	123.8

The quietest dates of 2010

Dates of 2010 with the fewest recorded U.S. births
Date	Weekday	Births	% of an average day
December 25	Saturday	6,159	55.4
April 4	Sunday	6,721	60.5
December 26	Sunday	6,796	61.2
March 14	Sunday	6,808	61.3
May 9	Sunday	6,823	61.4
January 31	Sunday	6,832	61.5
March 7	Sunday	6,887	62.0
February 7	Sunday	6,893	62.0
October 31	Sunday	6,895	62.0
February 28	Sunday	6,895	62.0

2010 by weekday and by month

Weekend days in 2010 recorded 61% of a weekday’s births per day. The quietest dates above are mostly weekend days and fixed holidays; the busiest are weekdays in late summer. The counts show the association.

2010: births per day by weekday

Seven columns, Monday to Sunday, average recorded births per day in 2010.

2010: births per day by weekday
Weekday	Days	Births per day
Tuesday	52	13,034
Wednesday	52	12,840
Thursday	52	12,670
Friday	53	12,126
Monday	52	11,821
Saturday	52	8,092
Sunday	52	7,184

2010: births per day by month
Month	Births	Births per day
September	355,887	11,863
August	354,727	11,443
June	338,966	11,299
July	349,648	11,279
December	344,247	11,105
March	343,448	11,079
November	330,984	11,033
October	341,767	11,025
April	329,137	10,971
February	306,393	10,943
May	332,651	10,731
January	328,120	10,585

Keep going

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Sources, method and limits

Source for 2010: Social Security Administration daily births for the United States, as compiled by FiveThirtyEight (CC BY 4.0). The 2000–2003 overlap between the two files is taken from the SSA file only. Weekday is taken from the record’s calendar date. Ranks within a year compare single days.

Every figure above comes from the administrative records named here, at the granularity those records publish: a day, a month or a year. Coverage and definitions differ between countries and eras, so two sources are combined only where their documentation states the windows are separate, and the page where that happens says so.

Full method, leap-day treatment and definitions.

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