There is more than one artist with this name. Most commonly refers to a band from California.
These are photos from concerts where The Day played, so they may be of other bands that played the concert as well.
Juicy Beats 2018 Jul 27 - 28, 2018 Dortmund, North Rhine-Westphalia, Germany Uploaded by Athousand Suns
Sasquatch! Music Festival 2010 May 29 - 31, 2010 George, Washington, United States Uploaded by Deadcow13