Giỗ Tổ Hùng Vương is a special holiday in Vietnam.
It happens on the 10th day of the third lunar month.
Many people go to Đền Hùng temple in Phú Thọ.
They pray and remember their ancestors.
The legend tells of Lạc Long Quân and Âu Cơ.
They are the parents of the Vietnamese people.
This day is important because it helps us remember where we come from.