What is the most popular birthday month?

While July, August and September are very popular months for birthdays, it is somewhat notable that July 4, Independence Day, appears to be an obvious uncommon birthday in the U.S. Most common: September 16 is the most popular birthday, and December 25 and February 29 are least popular. read more

Quick Answer. September was the most popular birth month in the United States in 2010, and data taken from U.S. births between 1973 and 1999 indicates that September consistently has the densest cluster of common birthdays. The same data from 1973 through 1999 indicates that January has the smallest number of births. read more