SONSOFDAY is a Portland, Oregon alternative rock band. The band consists of brothers Vlad, Roman, and Scotty Belonozhko. Born in a small town of Ukraine called Zvenigorodka, the brothers and their family immigrated to the United States in 1992 in pursuit of a better life and religious freedom.

The band was formed in 2005 by Roman, the oldest of the three brothers. They have since recorded two full albums and a four-song EP. In 2007, SONSOFDAY released their first full-length album, Fragile People. Soon after, the band began traveling extensively, playing concerts, festivals, and benefit shows, and managed to get radio play in various cities. The following year, they took first place at the Creation Festival indie band talent search, and their video "This Place" was voted Best Pop Music Video Of 2008 on the Gospel Music Channel.

They released their second full-length studio album, Autumn Heart, in 2009 via 1964 Records.