"Day of Light" is a song by industrial rock band KMFDM that was first released on February 1, 2010,[1] on 7" vinyl, and was limited to 250 copies[2][3] that sold out in less than 36 hours.[1][3] The title track on side A features vocals by William Wilson of Legion Within, a band with whom KMFDM frontman Sascha Konietzko worked on two albums.[4] The B-side is an instrumental track.[5] Both tracks were made available for download as mp3s from the KMFDM online store on March 13, 2010,[1] and "Day of Light" was included, along with a remix, on the "Krank" single.