In some countries, some years are more important than others.
In Holland, there are 5, 10, 15, 20 and 21.
They call them "crown" years.
On a crown birthday, the birthday child gets a much more important gift.
The family also decorates the child's chair at the dining table with flowers, paper and balloons.
The special years in Japan are 3, 5 and 7.
There are the lucky years.
On November 15 every year, there is a festival called "Seven, five, three" when the children and their families go to a religious place.
Then the family gives a party for the child and gives the child gifts.
Because of religious reasons, Hindu children only get to celebrate their birthday until the age of sixteen.