The most popular birthday in the United States is September 9th. This date is the most common birthday according to data collected over two decades. While September 9th takes the cake as the most common birthday, other dates in September also attract a large number of births. The top 10 most common birthdays are all in September, with September 19th and 12th coming in second and third place, respectively.
The popularity of September births may be attributed to several factors, such as the romantic evenings in November in the Northern Hemisphere, which often lead to conceptions in the following February and March. The resulting births would then fall in September.
While September 9th is the most common birthday in the United States, September 26th is the most popular day to be born in the United Kingdom over the past two decades. This date falls 39 weeks and two days after Christmas Day, suggesting a potential link between the holiday season and conception rates.
In New Zealand, the most common birthday is September 27th. Interestingly, the 10 most common birthdays in New Zealand all fall within a 13-day period from September 22nd to October 4th.
It's important to note that the specific dates and their rankings may vary slightly depending on the data source and the geographic location. However, the general trend of September birthdays being more common than others remains consistent across various studies and countries.
