3 years, 5 months ago
where can i find distribution of US births by day of the year--by birthday
I've found several listings for births per calendar month, and I've found births by day of the week (throughout the year). Where are data available on births by day (e.g., days 1 - 365 or 1 - 366 in Leap Years)?
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M$1 Answer
Well, here's a site that has it for 1978, strangely enough: http://www.dartmouth.edu/~chance/teaching_aids/data/birthday.txt
Example of what that site has for January births:
1/1/78 7701
1/2/78 7527
1/3/78 8825
1/4/78 8859
1/5/78 9043
1/6/78 9208
1/7/78 8084
1/8/78 7611
1/9/78 9172
1/10/78 9089
1/11/78 9210
1/12/78 9259
1/13/78 9138
1/14/78 8299
1/15/78 7771
1/16/78 9458
1/17/78 9339
1/18/78 9120
1/19/78 9226
1/20/78 9305
1/21/78 7954
1/22/78 7560
1/23/78 9252
1/24/78 9416
1/25/78 9090
1/26/78 9387
1/27/78 8983
1/28/78 7946
1/29/78 7527
1/30/78 9184
1/31/78 9152
Are you looking for a survey of multiple years? What is your more specific question? Information of this sort does seem difficult to find, but I figured I'd at least share that site.
Example of what that site has for January births:
1/1/78 7701
1/2/78 7527
1/3/78 8825
1/4/78 8859
1/5/78 9043
1/6/78 9208
1/7/78 8084
1/8/78 7611
1/9/78 9172
1/10/78 9089
1/11/78 9210
1/12/78 9259
1/13/78 9138
1/14/78 8299
1/15/78 7771
1/16/78 9458
1/17/78 9339
1/18/78 9120
1/19/78 9226
1/20/78 9305
1/21/78 7954
1/22/78 7560
1/23/78 9252
1/24/78 9416
1/25/78 9090
1/26/78 9387
1/27/78 8983
1/28/78 7946
1/29/78 7527
1/30/78 9184
1/31/78 9152
Are you looking for a survey of multiple years? What is your more specific question? Information of this sort does seem difficult to find, but I figured I'd at least share that site.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
Thank you for posting the January 1978 data, and indicating the source for additional data. I am not looking for data from any particular years, but was hoping someone knew of a source, or sources, that would provide temporally disparate years. If there were a common source for a defined range of years, my question could be made more specific. (I initially thought the Social Security Administration might provide data on birthdays, analogous to their data on popular given names.) FYI, the genesis of my curiosity was seeing reference to an article stating that the seasonal variation in birthdays for the UK had been distinct from that of the US for about 150 years, but has shifted in recent decades to be like that of the US. Distribution by-day is not needed to address such a question, but that's what got me to wonder about how variable within-year distributions have been for the US, and having data by days would provide great flexibility in looking at that. Your statement that such information is difficult to find, coupled with your identification of data (apparently, only) for 1978, may turn out to be the best scope of answer.