"Letting Go" is a song recorded by South Korean boy band Day6 for their second extended play Daydream. It was released as the EP's lead single by JYP Entertainment on March 30, 2016. It is the first release by Day6 as a five-member group since the departure of Junhyeok, on February 27, 2016.
On March 23, 2016 JYP Entertainment first released the group concept photo as well as individual concept photos of each member on March 25, 2016.
On March 28, 2016 JYP Entertainment released the music video teaser for the song. In the 22-second video, DAY6 expresses the sadness of the man who has no choice but to let go of the woman he loves.
"Letting Go" Is written by Young K and Wonpil and composed by Young K, Wonpil, Lee Woo Min and Homg Ji-sang. The song is composed in the key F minor and has 170 beats per minute and a running time of 3 minutes and 50 seconds.
On March 31, 2016, Day6 held their first comeback stage for the song on Mnet's M Countdown.