A birthday marks the special day you were born.
Each year on your birthday you turn one year older. Many families celebrate with cake, songs, and games.
More facts about Birthday Party
Blowing out candles on a cake is a birthday tradition.
Balloons float when they are filled with a light gas called helium.
People sing the 'Happy Birthday' song all around the world.
In Vietnam, some families celebrate a baby's first full month.
The most candles ever lit on one birthday cake was over 72,000.