The least popular birth month is March.
The least common birthday month is February, due to it being the shortest month and not having as many days for birthdates to occur.
September and february
December
A survey showed that JULY 19TH was the most popular birth date in the U.K. However I do not know what the least popular date is...
January
December 25th is considered the least popular birthday, as many people avoid scheduling births on holidays like Christmas.
January...absolutely horrible
April and December are usually the most popular, at least when visiting Mexico.
The month in which you were born is your birthday month
The least popular birthday in the world would be on February 29 because it is on leap year and leap year comes evry 4 years so February 29 only exists one day every 4 years so it would probly be the least popular.
February tends to have the fewest number of births, as it is the shortest month and has a lower number of days compared to other months.