THE BEST DAY is the first Japanese best album of DAY6. It was released on June 6, 2018 in two editions: limited CD+DVD and regular CD Only. The Limited edition comes with a 40-page photobook and packed in a slipcase. Both editions comes with a trading card.
The best album includes all Korean title tracks of the group released up to MOONRISE, two English versions and a Japanese version of "I Wait".
A special version of the album was released digitally on the same day including the new versions and "DANCE DANCE".[N1] This special edition was also released worldwide but without "DANCE DANCE".
All tracks with Korean titles were re-titled in English for this release.
Notes
^ On January 25, 2021, "DANCE DANCE" was removed from the Japanese digital stores due to the expiration of contract with Warner Music Japan, leaving only the three new versions included in the album.[1]