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.

Buddhists march on the street as they prepare for the buddha's birthday in Seoul. (Photo by Chung Sung-Jun/Getty Images)

People walk with lanterns as they prepare for the buddha's birthday in Seoul. (Photo by Chung Sung-Jun/Getty Images)

Buddhists march on the street as they prepare for the buddha's birthday in Seoul. (Photo by Chung Sung-Jun/Getty Images)

People walk under colorful lanterns as they celebrate the forthcoming birthday of Buddha at the Chogey temple. (Photo by Chung Sung-Jun/Getty Images)

South Korean Buddhists march on the street as they prepare for the buddha's birthday on May 11, 2013 in Seoul, South Korea. (Photo by Photo by Chung Sung-Jun/Getty Images)

Lanterns are displayed to celebrate Buddha's birthday along a stream in Seoul. (Photo by Ahn Young-joon/Associated Press)

Preparing for the buddha's birthday, people march through the streets of Seoul. (Photo by Chung Sung-Jun/Getty Images)

People walk under colorful lanterns as they celebrate the forthcoming birthday of Buddha at the Chogey temple in Seoul. (Photo by Chung Sung-Jun/Getty Images)

People march on the street as they prepare for the buddha's birthday in Seoul. (Photo by Chung Sung-Jun/Getty Images)

Lanterns are displayed in advance of the buddha's birthday in Seoul. (Photo by Chung Sung-Jun/Getty Images)

Visitors take pictures of lanterns during the Lotus Lantern Festival to celebrate the upcoming birthday of Buddha on May 17, at Jogye temple in Seoul, South Korea, Sunday, May 12, 2013. (Photo by Ahn Young-joon/AP Photo)

People carry lanterns as they march through the streets of Seoul. (Photo by Chung Sung-Jun/Getty Images)