Sustainable House Day is a mainstay event on the national sustainable calendar. Previously known as Solar House Day, the event underwent a name change in 2006 to more accurately reflect the broad range of sustainable features in the participating houses particularly in relation to the focus on the sustainable use of water. The annual event is held on the second weekend of September and is entering its 7th year of operation. The aim of Sustainable House Day is to showcase sustainable design and to encourage the adoption of sustainable design features in existing homes and new homes. The focus is to show how simple, easy and cost effective sustainable living can be.