most common birthday in october
Studies of the most common individual U.S. birth dates show they always cluster from midsummer to early autumn, with minor variations. One study by the now-defunct data site anybirthday.com found the most common birthday to be October 5, and the least common, May 22. The Harvard study gave December 25, Christmas, as the least common birthday, and January 1 and December 24 as the next least common.