A birthday is a celebration of someones birth. When it is your birthday, you turn a year older. Some people are born on a leap year depending on when there birthday is. If somebody's birthday is on a leap year, their birthday is celebrated on a different day.
When its somebodys birthday, most people will give presents, buy a cake, throw a party etc. Not everyone celebrates their birthday the same way that others do. There's a lot of cool ways to celebrate your birthday.
By Karla Pope
By Vecteezy
By CNN