April 11 - The Olympic and Paralympic flags are flying above Gangwon Province in South Korea - where the Pyeongchang 2018 Winter Games will be held - to mark the 1,400-day countdown.
More than 500 people, including athletes, sports industry experts, officials and other stakeholders gathered outside the Gangwon Provincial Government building for the ceremony.
Both flags were raised during the hour-long celebration, as preparations continue to gather pace for the Games.
Speed skater Lee Sang-hwa, who won 500 metres gold at Vancouver 2010 and Sochi 2014, was joined by ice sledge hockey player Jung Seung-hwan to hoist the flags with the Olympic Anthem playing in the background.
Those in attendance, which included those from the cities of Pyeongchang, Gangneung and Jeongseon - which will all host events during the Winter Games - ended the ceremony by shouting slogans pledging a successful delivery of the Games.
Pyeongchang 2018 is due to open on February 9, with the Closing Ceremony on February 25.
The Paralympic Winter Games are scheduled to take place from from March 9 to 18.
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