https://en.wikipedia.org/wiki/Birthday_problem
1st, replace problem with paradox. 2nd read on! 3rd, be annoyed at math (it can be tricky!)
Finally, go on with your life knowing full well that no one cares (or feels sorry that) you don't understand or were never taught the concept of a paradox.
It's because certain events make people more likely to have sex and therefore children. Days like New Years, Valentines day, and other holidays are common days for sex and therefore there are more likely to be children born around nine months later.
1st, replace problem with paradox. 2nd read on! 3rd, be annoyed at math (it can be tricky!)
Finally, go on with your life knowing full well that no one cares (or feels sorry that) you don't understand or were never taught the concept of a paradox.