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 d... More »

The most common month overall for birthdays is September followed closely by August and July. Specifically, September 16th is the most common birthday in the United States. According to the Centers for Disease Control, h... More »

In the United States as of 2014, August is the most popular month for birthdays. In Northern Europe, March to May statistically produces the highest number of births. More »

In countries close to the equator November is the month with the most birthdays and those furthest from the equator have the most birthdays in September. This seasonal pulse can also be seen within the Northern and South... More » Holidays & Celebrations Birthdays

A half birthday is celebrated six months before or after the anniversary of someone's birth. For example, a June 5th birthday becomes a December 5th half birthday. For a more precise calculation, add or subtract exactly ... More » Holidays & Celebrations Birthdays

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 inf... More »

In the US, the most popular birthday date is September 16. This date is followed in popularity by September 9 and September 23. The least popular birthday date is February 29, occurring only every four years. The second ... More »