Losar, the most important holiday in Tibet, is celebrated as Tibetan New Year. The word Losar is a Tibetan word for New Year. LO means year and SAR means new. The celebrations of this festival lasts for 15 days and can be traced back to the pre-Buddhist period in Tibet.During the period when Tibetans practiced the Bon religion, every winter a spiritual ceremony was held, in which people offered large quantities of incense to appease the local spirits, deities and protectors. This religious festival later evolved into an annual Buddhist festival which is believed to have originated during the reign of Pude Gungyal, the ninth King of Tibet. The festival is said to have begun when an old woman named Belma introduced the measurement of time based on the phases of the moon. This festival took place during the flowering of the apricot trees of the Lhokha Yarla Shampo region in autumn, and it may have been the first celebration of what has become the traditional farmers' festival.

The last day of the year is a time to clean and prepare for the approaching New Year. In the monasteries it is a day of preparations. The finest decorations are put up and elaborate offerings are made of called "Lama Losar". In the early dawn of this day, the monks of Namgyal Monastery offer a sacrificial cake (Tse- tor) on top of the main temple (Potala in Tibet) to the supreme hierarchy of Dharma protectors, the glorious goddess Palden Lhamo. Led by the Dalai Lama, the abbots of three great monasteries, lamas, reincarnated monks, government officials and dignitaries join the ceremony and offer their contemplative prayers, while the monks of Namgyal Monastery recite the invocation of Palden Lhamo. After the completion of this ceremony, all assemble in the hall called Excellence of Samsara and Nirvana for a formal greeting ceremony. Seated on his or her respective cushions, everyone exchanges the traditional greeting, "Tashi delek".

The second day of Losar is known as King's Losar (gyal-po lo-sar) because officially the day is reserved for a secular gathering in the hall of Excellence of Samsara and Nirvana. His Holiness and his government exchange greetings with both monastic and lay dignitaries, such as representatives of China, India, Bhutan, Nepal, Mongolia and other foreign visitors.

Then from the third day onwards, the people and monks begin to celebrate and enjoy the festive season. In Tibet before the Chinese came, Losar had been celebrated for fifteen days or more. In India today we celebrate for three days, and in America we have minimized it to one day. In this way the three days of the New Year celebration officially concludes.