Legends
A Hindu festival, Holi has various legends associated with it. The foremost is the legend of demon King Hiranyakashyap who demanded everybody in his kingdom to worship him but his pious son, Prahlad became a devotee of Lord Vishnu. Hiranyakashyap wanted his son to be killed. He asked his sister Holika to enter a blazing fire with Prahlad in her lap as Holika had a boon which made he immune to fire. Story goes that Prahlad was saved by lord himself for his extreme devotion and evil minded Holika was burnt to ashes, for her boon worked only when she entered the fire alone.
Since that time, people light a bonfire, called Holika on the eve of Holi festival and celebrate the victory of good over evil and also the triumph of devotion to god. Children take special delight in the tradition and this has another legend attached to it. It says that there was once an ogress Dhundhi who used to trouble children in the kingdom of Prithu. She was chased away by children on the day of Holi. Therefore, children are allowed to play pranks at the time of 'Holika Dahan'.
Some also celebrate the death of evil minded Pootana. The ogress tried to Lord Krishna as an infant by feeding it poisonous milk while executing the plan of Kansa, Krishna's devil uncle. However, Krishna sucked her blood and brought her end. Some who view the origin of festivals from seasonal cycles believe that Pootana represents winter and her death the cessation and end of winter.