Of all the spring festivals Holi seems the happiest to me.
From Wikipedia:
Holior is an annual Hindu spring festival, predominantly celebrated in North India and Nepal. It takes place over two days around late March or early April. As per the Hindu calendar, it falls on the last day on the month of Phalgun, which is a Purnima (or Pooranmashi, Full Moon), and on the first day of Chaitra. It is a celebration also of the Hindu New Year, as Chaitra is the first month of the Hindu Year.
It is also called the Festival of Colour. On the first day, a bonfire is lit at night to signify burning Holika. On the second day, known as Dhulandi, people go around until afternoon throwing coloured powder and water at each other, although the powder stings the eyes.
A special drink called ‘thandai’ or bhang is also consumed sometimes, which actually contains small amounts of marijuana(Cannabis sativa). People invite each other to their houses for feasts and celebrations later in the evening. Rangapanchami occurs a few days later on a Panchami (fifth day of the full moon), marking the end of festivities involving colours.
In Hindu mythology, Hiranyakashipu was the king of demons, and he had been granted a boon by Brahma, which made it almost impossible for him to be killed. The boon was due to his long penance, after which he had demanded that he not be killed “during day or night; inside the home or outside; not on earth or on sky; neither by a man nor an animal; neither by astra nor by shastra”. Consequently, he grew arrogant, and attacked the Heavens and the Earth. He demanded that people stop worshipping gods and start praying to him. But his own son, Prahlad, was a devotee of Lord Vishnu. In spite of several threats from Hiranyakashipu, Prahlad continued offering prayers to Lord Vishnu.
He was poisoned but the poison turned to nectar in his mouth. He was ordered to be trampled by elephants yet remained unharmed. He was put in a room with hungry, poisonous snakes and survived. All of Hiranyakashipu’s attempts to kill his son failed. Finally, he ordered young Prahlad to sit on a pyre on the lap of his sister, Holika, who could not die by fire by virtue of a shawl which would prevent fire affecting the person wearing it. Prahlad readily accepted his father’s orders, and prayed to Vishnu to keep him safe. When the fire started, everyone watched in amazement as the shawl flew from Holika, who then was burnt to death, while Prahlad survived unharmed, after the shawl moved to cover him. The burning of Holika is celebrated as Holi. It is also said that later Lord Vishnu came in the form of a Narasimha (who is half-man and half-lion) and killed Hiranyakashipu at dusk (which was neither day nor night), on the steps of the porch of his house (which was neither inside the house nor outside) by restraining him on his lap (which is neither in the sky nor on the earth) and mauling him with his claws (which are neither astra nor shastra).
In Vrindavan and Mathura, where Lord Krishna grew up, the festival is celebrated for 16 days (until Rangpanchmi in commemoration of the divine love of Radha for Krishna). Lord Krishna is believed to have popularized the festival by playing pranks on the gopis here. Krishna is believed to be complained about his dark colour and Radha’s fair colour to his mother and so decided to apply colour to her face. The celebrations officially usher in spring, the celebrated season of love.
There is another story about the origin of holi. The Kamadeva is God of love. Kama’s body was destroyed when he shot his weapon at Shiva in order to disrupt his penance and help Parvati to marry Shiva. Shiva then opened his third eye, the gaze of which was so powerful that Kama’s body was reduced to ashes. For the sake of Kama’s wife Rati (passion), Shiva restored him, but only as a mental image, representing the true emotional and mental state of love rather than physical lust. The Holi bonfire is believed to be celebrated in commeration of this event.
The Holi Festival looks like a tradition I want to import to grey Germany - although this chap doesn’t look too happy.
Get an even bigger color rush with a big Holi image pool on Flickr.

