In 2005, Lambda Legal filed a lawsuit on behalf of six Polk County same-sex couples and their children who were denied marriage licenses in Iowa, arguing that this denial violated the liberty and equal protection clauses in the state constitution. In 2007, the Polk County District Court ruled in favor of the couples, prompting the county to appeal to the Iowa Supreme Court. On April 3, 2009, the Iowa Supreme Court unanimously upheld the District Court's ruling holding that there was no important governmental interest in denying citizens marriage licenses based on their sexual orientation. Licenses were originally to be available 21 days after the ruling, on April 24, but the availability of licenses was subsequently postponed until April 27 due to a Furlough day.