On Your Birthday, With Best Wishes.
Even though it’s our birthday, we might tell ourselves that it’s the most important day of the year, but the truth is that millions of other people around the world also have birthdays. Even though having the same birthday as someone else doesn’t make the day less important, it’s still a strange feeling to have the same birthday as someone else.

It turns out that there is a 1 in 2 chance that two of the 23 people in a group have the same birthday. This is a pretty good chance. We can’t figure out what the number 23 is supposed to do in this equation, which is really simple otherwise. If you’re like us, you might find it funny when you occasionally meet someone who has the same birthday as you.