High Quality Content by WIKIPEDIA articles! The Social Democratic Party "Harmony" (Latvian: Sociāldemokrātiskā Partija "Saskaņa," SDPS, Russian: Sotsial-demokraticheskaya partiya "Soglasie") is a Latvian center-left party founded on 10 February 2010 by most of the constituent organisations of the Harmony Centre alliance: the National Harmony Party, the New Centre and the Social Democratic Party (but not the Socialist Party of Latvia and the Daugavpils City Party, who will continue to cooperate with the new party within the Harmony Centre alliance). It held its first party congress on 24 April 2010. The Daugavpils City Party merged into the new party in 2011.