Statistical data from the CDC shows that September is the most common birth month in the United States, making Virgo the most common zodiac sign.
The most common birthdays fall between September 9-20, right in the heart of Virgo season. This means more people are conceived around the winter holidays in December.
Conversely, February (Aquarius/Pisces) has the fewest births, making Aquarius one of the rarest zodiac signs.