What is the most uncommon birthday?

Question:

What is the most uncommon birthday?

Which day of the year has the least amount of births? It probably varies from year to year, but there must be some kind of a trend. February 29th would probably be the answer (because it only comes once every four years) but dont count in that day, please.
Thank you

Additional Details

7 months ago
I know February 29th is the least common birthday. I already asked not to include that day.

Best Answer - Chosen by Asker:

Wikipedia says that the most common is Oct 5th, least common is May 22nd.

http://en.wikipedia.org/wiki/birthday... (look under trivia)