Celebration of Buddha birthday at Bouddhanath stupa in Kathmandu, Nepal.
More information – http://en.wikipedia.org/wiki/Buddha’s_Birthday
In Nepal, Buddha’s birthday is celebrated on the full moon day of May. The festival is known by various names, Buddha Jayanti, Buddha Purnima, Vaishakh Purnima and Vesak. The day marks not just the birth of Shakyamuni Gautam Buddha but also the day of his Enlightenment and Mahaparinirvana. But as a gentle effect of the West, the event of the birth is given paramount importance.