Holi is One of the most important full of colour festival in India and Celebrated in all over in India.
Holi is celebrated at the end of winter, on the last full moon day of the Hindu luni-solar calendar month marking the spring, making the date vary with the lunar cycle. The date falls typically in March, but sometimes in February.

Holi knows no bars and boundaries.  There are many interesting stories associated with Holi.
Mythology plays a very important part in narrating the festival of Holi. The most popular stories of Holi origin relates to 'Holika Dahan' and Legend of Radha-Krishan.
Holi celebrations start on the night before Holi with a Holika bonfire where people gather, do religious rituals in front of the bonfire and pray that their internal evil should be destroyed as the bonfire starts.

Holika Dahan ritual is symbolic of victory of good over evil and has its root in the legend of demon king Hiranyakashyap who wished to end his blessed son, Prahlad's life with the help of his sister, Holika who burnt in the fire and no harm occurred to Prahlad. Since then the day is celebrated in victory of good over bad.
Another story is related with holi  “Radha Krishna”
The legend of Radha and Krishna is closely linked with this tradition of colors on Holi. Krishna, who had a dark complexion was jealous of his beloved Radha's extremely fair skin. In a mischievous mood, he applied color on Radha's face. Following this ancient legend, lovers till date long to color their beloved as an expression of love.