Perdue signed a proclamation declaring Friday as a "Day of Mourning."
Connecticut Gov. Dannel Malloy wrote governors across the nation, asking them to participate. Malloy also asked houses of worship and government buildings to ring bells 26 times during that moment in honor of each life lost in the Sandy Hook Elementary School shooting.
A gunman armed with a military-style assault rifle and several high-capacity ammunition magazines slaughtered 20 children and six teachers and administrators at the school in Newtown, Conn., last Friday.