BTS has prepared a fun challenge for their fans!
ARMYPEDIA is a "digital archive of all things BTS, made by ARMY." For a month starting on February 25, ARMYs have to find puzzle pieces scattered all over the world, and complete ARMYPEDIA, which consists of 2,080 days (from the date of BTS' debut on June 13, 2013, to the eve of ARMYPEDIA’s unveiling on February 21, 2019).
ARMYs around the world must work together to find the 2,080 puzzle pieces located both on and offline. The directions on the ARMYPEDIA website states, "Each puzzle piece represents one date, and each of the 2,080 pieces are designated by a date and a number. A QR code is also included with each puzzle piece, which can be scanned to answer that piece’s quiz question about BTS. All the date cards on ARMYPEDIA are locked until ARMY can uncover the puzzle pieces, and then use the QR code on each piece to successfully answer the quiz."
A "special reward" will be given once ARMYPEDIA is complete. For more details, you can check out the ARMYPEDIA website here.