The Optimist Australian & Open Championships are held each year in January, rotating around the different states. Sailors in Open, Intermediate and Green fleets can enter.
The 2024 Musto Australian and Open Optimist Championships wil be at Brighton and Seacliff Yacht Club in Adelaide in Jan 2024. See details at https://www.optimist.org.au/nationals/
The following are videos from the 2020 Nationals in Williamstown, Victoria:
The following video captures the spirit of the event in Mornington, Victoria in 2014.