On the flip side, December 26 is the least common birthday. In the years involved in the chart, there were an average of 1,311 babies born annually on Boxing Day.

In fact, the four least common birthday dates all fall on a holiday. July 4, December 24, January 1, and December 25 are the least common birthdays, in order of decreasing popularity.

The least common birthday is leap day, or February 29. But because the day only occurs once every four years, it’s obvious it would yield the least amount of birthdays.

What is the rarest birthday? The least common birthday is leap day, or February 29. But because the day only occurs once every four years, it’s obvious it would yield the least amount of birthdays.

Happy birthday to you and you and you: Why Sept. 9 is the most common birthday This is the real labor day. Sept. 8, 2023, 12:53 PM PDT Ethan Sacks ...

The least common birthday is leap day, or February 29. But because the day only occurs once every four years, it’s obvious it would yield the least amount of birthdays.