In ancient Greece, people worshipped themis, the goddess of the moon, and held a birthday celebration for her every year. On the altar, cakes made of flour and honey are placed with many lighted candles. They compared the light emitted by candles with the brightness of the moon to show their special worship for the goddess of the moon.
Later, when the ancient Greeks gave their children birthdays, they also liked to put cakes on the table. Many small lighted candles were inserted into the cake, and the content of blowing out the candles was added. They believe that burning candles have some magical and mysterious power. When a birthday person silently makes a wish in his heart, it can be realized by blowing out all the candles in one breath. This custom has been spread to modern times and is very popular in many countries.