Therefore, since the world population as of this writing is estimated at 6,568,250,905, you share your birthday with nearly 18 million people around the world (17,995,207).
Here are how many people you share your birthday with for countries around the world:
You currently share your birthday with about 824,456 people who reside in the United States but only 90,682 Canadians, 166,052 British, 225,813 Germans, and 349,216 Japanese.
On a grand scale, you share your birthday with about 3.6 million Chinese and 3 million Indians.
However, among the non-permanent residents of the world's least populated and smallest country in area, the Vatican City, you only share your birthday with 2 to 3 people on any given birthday. In the island country of Tuvalu, about 35 people sing "Happy Birthday" on any given day.
Leap Year
If you are lucky enough to have been born on February 29, you share your birthday with 1/1461 (because 366+365+365+365 equals 1461) of the population (0.068%) and so worldwide, you only share your birthday with a mere 4,495,722 people!
That means that a mere 204,630 Americans and only 22,507 Canadians share the very special February 29 birthday!
