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According to real birth data compiled from 20 years of American births, mid-September is the most birthday-packed time of the year, with September 9th being the most popular day to be born in ...


It’s baby season in America, with September the busiest month for births on average in the last two decades. So it seemed like the right time to remix this blog’s most-popular post: How Common is Your Birthday? That old heatmap, which highlighted specific dates for popularity, has been viewed more than 500,000 times here and published across the web.


The charts, produced by University of Virginia student Dan Lin,show that most American babies are born in July, August and September, while the least are delivered on major holidays.


Based on Harvard University research of birth records in the United States between 1973 and 1999, September 16 is the most common birthday in the United States and December 25 the least common birthday (other than February 29, because of leap years). In 2011, October 5 and 6 were reported as the most frequently occurring birthdays.


How Common Is Your Birthday? The following table shows every day of the year, from Jan. 1 to Dec. 31, along with a ranking based on how many babies were born in the United States on that date ...


The most common birthday in the United States is September 16, based on National Vital Statistics Reports of people born between 1973 and 1999. The least common birthdays are December 25 and February 29, according to information published by Amitabh Chandra of Harvard University.


The most common birthday in the United States is in September, which means a lot of parents are conceiving around Christmas. A lot of parents are conceiving around Christmas.


Using Harvard University data, the graph shows September 16 is the most common birthday in the U.S., while February 29 is the least common.


The most common day of the week to deliver in 2006 in the United States was Wednesday, stealing the No. 1 spot from Tuesday, which had been the most common birth day since 1990, according to the CDC.


Matt Stiles' birthday heat map gives us a picture of which birthdays are the most and least common in the United States. Stiles used a table that ranks birthdays for people born between 1973 and ...