The Birthday Paradox

Most people know the birthdays of their close family members or friends.

But when you’re in a crowd of people, something surprising happens.

Now that I think about it, I actually know someone with the same birthday as me, and the same age. A friend's brother I’ve known since I was 22.

And speaking of probability, here’s another funny coincidence: this year my birthday falls on a Thursday, and guess what day I was born on… a Thursday.

Thanks to the Birthday Paradox, in a group of just 23 people, there’s about a 50.7% chance that at least two people will share the same birthday.

This happens because the number of possible birthday comparisons grows quickly as more people are added to a group. Even though there are 365 days in a year, the number of ways people can match each other increases much faster than we expect.

By the time a group reaches:

• 30 people → about a 70% chance of a shared birthday
• 40 people → about a 90% chance

Probability can be strange sometimes... do you remember

And speaking of birthdays…

At Danna Bananas, we carry quirky and hilarious funny gifts in Canada, with orders shipping across the country and in Toronto too. Because birthdays should come with cake, laughter, and maybe a pair of funny crazy socks.

If you’re celebrating someone special, funny birthday gifts are always a hit.