OzCLO 2023 dates
The first round will be held online on Wednesday, 1 March 2023. The competition is held at the same time across Australia – the specific times for each state time zone are listed in the table below.
|State||Preparation Time||Competition Time|
|ACT||1:30 – 2:30pm||2:30 – 4:30pm|
|NSW||1:30 – 2:30pm||2:30 – 4:30pm|
|NT||12:00 – 1:00pm||1:00 – 3:00pm|
|QLD||12:30 – 1:30pm||1:30 – 3:30pm|
|SA||1:00 – 2:00pm||2:00 – 4:00pm|
|VIC||1:30 – 2:30pm||2:30 – 4:30pm|
|WA||10:30 – 11:30am||11:30am – 1:30pm|
The second round, for the top-scoring teams from the first round, will be held offline on Wednesday, 22 March 2023.
The first round is a two-hour contest. Students compete in teams of four. Each team enters their team’s solutions on one computer. Teachers are given access to a pdf copy of the problem set an hour before the competition begins for students, and should give each student a printed copy to work on.
For further information on the format of the competition, please check our FAQ page below.Visit FAQ
Registration will open from Monday January 16 to Friday February 24 2023. The cost of registration in 2023 will be $40 per team. For teams that register after the closing date, we will be charging a Late Fee of $20 per team.
Please note that only teams that are based at a school may participate, and only teachers may register their teams.Register here