August 18most common birthdayindex 111.7, 100 is an average day
December 24least common, leap day asideindex 66.8
Julybusiest month per dayindex 107.5; December quietest at 91.1
84%weekend levelSaturday and Sunday against a weekday, per day, 2007–2025
Across the 19 complete years 2007–2025 in the Statistics Denmark daily series, 1,145,696 recorded births, the most common birthday in Denmark is August 18, at 111.7 where 100 is an average day, and the least common date that occurs every year is December 24, at 66.8. July is the busiest month per day and Wednesday the busiest weekday; a Saturday or Sunday records about 84% of a weekday’s births. Every figure on this page comes from this one national series.
All 366 dates, most to least common
All 366 dates from most to least common, Denmark, 2007–2025
Births per occurrence for every calendar date in Denmark, sorted from the busiest to the quietest, coloured by the six rarity tiers applied to this country’s own values.
Very common 90Common 93Uncommon 147Rare 18Very rare 15Super rare 3September 9, the most common date in the United States, is marked where it stands in Denmark.
Denmark, every date of the year: births per occurrence, index (100 = average day), 2007–2025
Every calendar date in order as one line, births per occurrence indexed to the average day, with the busiest and quietest dates marked.
The deepest dips are fixed public holidays; the broad rise and fall across the year is the season.
February 29 occurred in 5 of these 19 years (2008, 2012, 2016, 2020, 2024); measured per occurrence it ranks #361 of 366 at index 88.4. Each date links to its U.S. page, which shows this country’s matched-window rank for it.
The calendar, date by date
Every date in its rarity tier for Denmark, the six colours of the reveal applied to this country’s own per-occurrence values, with its rank of 366 in the corner.
Twelve months as births per observed day, with the busiest and quietest labelled.
July leads at index 107.5; December is quietest at 91.1.
Months in Denmark by births per day, 2007–2025
Month
Births per day
Index (100 = average day)
January
158
95.6
February
163
98.9
March
160
96.8
April
160
96.7
May
164
99.6
June
172
104.1
July
177
107.5
August
176
106.8
September
174
105.6
October
166
100.8
November
159
96.5
December
150
91.1
Births per day by weekday in Denmark, 2007–2025
Monday to Sunday as births per observed day, with the busiest and quietest labelled.
Wednesday leads; Sunday is quietest. The weekday is taken from the calendar date of each row.
Weekdays in Denmark by births per day, 2007–2025
Weekday
Births per day
Index (100 = average day)
Monday
170
103.2
Tuesday
176
106.7
Wednesday
177
107.5
Thursday
172
104.3
Friday
170
103.1
Saturday
148
89.8
Sunday
141
85.5
The weekend gap, year by year
Saturday and Sunday births per day as a percentage of Monday-to-Friday births per day in the same year: 82% in 2007 and 87% in 2025. A change in this line is a change in when births are recorded across the week.
Weekend births as a percentage of weekday births, Denmark, 2007–2025
Saturday and Sunday births per day against Monday-to-Friday births per day in the same year, one point per year.
Each year against its own weekday level.
Births by year in Denmark, 2007–2025, with the weekend level
Year
Recorded births
Weekend births per day, % of weekday
2007
64,082
82.3%
2008
65,038
80.3%
2009
62,818
80.6%
2010
63,411
81.3%
2011
58,998
79.9%
2012
57,916
80.5%
2013
55,873
82.2%
2014
56,870
81.9%
2015
58,205
82.4%
2016
61,614
83.0%
2017
61,397
84.0%
2018
61,476
87.0%
2019
61,167
86.4%
2020
60,937
85.8%
2021
63,473
86.4%
2022
58,430
85.0%
2023
57,469
85.6%
2024
57,079
85.6%
2025
59,443
86.7%
Year by year
Each complete year of the series on its own page, with the weekday each date fell on:
Source: Statistics Denmark, FODDAG, live births by day, open data terms of the publisher; table update of February 12, 2026; the 128 impossible calendar cells of the 31-by-12 grid are omitted. 6,940 daily rows, of which the 19 most recent complete years (2007–2025, 6,940 days, 1,145,696 births) are ranked here. Every complete year the file holds is used.
Ranks compare births per occurrence, so February 29 is judged on the years it occurred in. Equal values share a rank. The six tier colours apply the reveal’s rule to this country’s own values; they are a reading aid.
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.
