The five extra days added to the egyptians calendar were for?

The five extra days were added to the original 360 day calendar for the birth of the children of Nut, god of the sky, and Geb, god of the earth. Re (Ra,Ray), the supreme god of Egyptian mythology, forbade Nut to have her children on any of the 360 days of the year. So, Nut gambled with the moon god for moonlight. After she gained enough moonlight for 5 days she added them onto the year creating a 365 day year. These 5 days are called the demon days and on each of them a child of Nut was born.
feast days for the gods