September identified as month with most frequent birthdays

Global statistics reveal that September is the most common month for birthdays, with the top 11 most frequent birthdays all occurring in this month. Specifically, September 16 is identified as the most common birthday, followed by September 9 and September 23.

Some speculate that the high frequency of September births may be linked to the December holiday season, suggesting a correlation between holiday celebrations and conception rates.

Conversely, the rarest birthdays include January 1 and December 25, which may be attributed to lower hospital delivery rates during holidays. The rarest specific date is February 29, which only occurs during leap years. In Hong Kong, the population born on February 29 is estimated to be approximately 5,000 people.