The Lantern Festival in Seoul, South Korea, celebrates Buddha’s birthday. Buddha was born approximately 2,557 years ago; the exact date is unknown, but Buddha’s official birthday is celebrated on the full moon in May in South Korea, which is May 17 this year. Photo: Buddhists march on the street as they prepare for the buddha's birthday in Seoul. (Photo by Chung Sung-Jun)

Robot Xian'er is placed in the main building of Longquan Buddhist temple for photographs by the temple's staff, on the outskirts of Beijing, April 20, 2016. (Photo by Kim Kyung-Hoon/Reuters)

A man carries his dog as he prays during Vesak Day, an annual celebration of Buddha's birth, enlightenment and death, at Wat Yai Chai Mongkhon temple in Ayutthaya, Thailand, May 10, 2017. (Photo by Athit Perawongmetha/Reuters)

A monk prays during the annual Fire Festival held at the Konjoin Temple on June 28, 2006 in Nasushiobara, Tochigi Prefecture, Japan. Every year around 1000 visitors come to participate and to wish for good luck at the 1200 year old Temple. (Photo by Koichi Kamoshida/Getty Images)

Shaolin monks pose for a photograph in Chinatown on February 23, 2015 in London, England. The monks practice Shaolin Kung Fu which is believed to be the oldest institutionalised style of kung fu and are demonstrating their skills while in the UK. (Photo by Carl Court/Getty Images)