To determine how popular a birthday is, it usually depends on the specific date. For example, in the United States:
- September 9 is the most common birthday, with over 12,000 babies born on this day each year.
- Many of the most common birthdays fall in September, with 9 out of the top 10 most common birthdays occurring in that month.
- Conversely, the least common birthdays tend to fall on holidays like February 29 (leap day), December 25, and January 1.
- Popular birth months are typically July, August, and September, with August having the highest overall number of births.
If you provide your exact birthday, I can tell you how popular that specific date is according to current data. Otherwise, birthday popularity generally ranges widely depending on the date, with summer and early fall dates being more common and winter holidays and leap day being rarest.