What was the most common birthday in 2001?

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

December 28most births in 2001a Friday, 14,235 births
December 25fewest births in 2001a Tuesday, 6,603 births
Augustbusiest month per day11,916 births per day
Tuesdaybusiest weekday12,791 per day against 7,777 on Sunday

In 2001 the United States recorded 4,110,963 births over 365 days, 11,263 on an average day. The busiest single date was December 28, a Friday, with 14,235 births; the quietest was December 25, a Tuesday, with 6,603. Within one year every date has one weekday, so the weekday column below is a fact of that date.

Every day of 2001: recorded U.S. births

Every day of 2001 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 2001

Dates of 2001 with the most recorded U.S. births
Date	Weekday	Births	% of an average day
December 28	Friday	14,235	126.4
December 27	Thursday	14,151	125.6
September 25	Tuesday	14,063	124.9
September 5	Wednesday	14,055	124.8
September 6	Thursday	13,925	123.6
December 20	Thursday	13,871	123.2
August 28	Tuesday	13,792	122.5
September 20	Thursday	13,750	122.1
September 7	Friday	13,721	121.8
July 17	Tuesday	13,657	121.3
December 18	Tuesday	13,657	121.3

11 dates are listed because the tenth total is shared.

The quietest dates of 2001

Dates of 2001 with the fewest recorded U.S. births
Date	Weekday	Births	% of an average day
December 25	Tuesday	6,603	58.6
April 1	Sunday	7,212	64.0
April 15	Sunday	7,230	64.2
December 23	Sunday	7,245	64.3
December 2	Sunday	7,385	65.6
December 16	Sunday	7,432	66.0
November 25	Sunday	7,456	66.2
May 13	Sunday	7,479	66.4
November 18	Sunday	7,495	66.5
December 9	Sunday	7,498	66.6

2001 by weekday and by month

Weekend days in 2001 recorded 67% 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.

2001: births per day by weekday

Seven columns, Monday to Sunday, average recorded births per day in 2001.

2001: births per day by weekday
Weekday	Days	Births per day
Tuesday	52	12,791
Thursday	52	12,727
Wednesday	52	12,657
Friday	52	12,557
Monday	53	11,434
Saturday	52	8,895
Sunday	52	7,777

2001: births per day by month
Month	Births	Births per day
August	369,383	11,916
September	349,988	11,666
July	358,079	11,551
October	351,852	11,350
May	350,689	11,313
June	337,606	11,254
March	345,345	11,140
February	309,819	11,065
January	342,379	11,044
November	331,276	11,043
April	329,884	10,996
December	334,663	10,796

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Sources, method and limits

Source for 2001: 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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