During their 2009 Montreal Assault Tour, Despised Icon announced that they were recording a new studio album, entitled "Day of Mourning", that was released on September 22, 2009 by Century Media Records. On July 17, 2009, Despised Icon released their song, "MVP" as the first song off of "Day of Mourning" onto the web. They played on the 2009 Thrash and Burn Tour alongside DevilDriver, Emmure, Veil of Maya, For the Fallen Dreams, Oceano, Periphery, MyChildren MyBride, and Thy Will Be Done. Their fourth album "Day of Mourning" was released as scheduled on September 22, 2009, and reached No. 162 on the "Billboard" 200 as of September 30, 2009. A music video was created and released for the title track of the album.