Holi - The Festival of Colours, India

Where? India 

When? 27th March

Holi Festival is a religious spring festival celebrated by Hindus as a festival of colours. Every year, thousands of Hindus participate in the festival. It celebrates the beginning of the new season of spring. Originally, it was a festival that commemorated good harvests and the fertile land. Hindus believe it is a time of enjoying spring's abundant colors and saying farewell to winter. It also has a religious purpose, commemorating events present in Hindu mythology. Although it is the least religious holiday, it is probably one of the most exhilarating ones in existence.

Further Information: http://www.holifestival.com/