International Science Olympiads is a free calendar you can subscribe to on Nundina, with 6 dates listed. Data from International Science Olympiads. Subscribe to it on Nundina and every date lands in your own calendar, updated automatically.
World finals of the international science olympiads for secondary-school students - mathematics, chemistry, biology, astronomy and linguistics. Only editions whose dates have been officially announced by the organising committee are listed, so the calendar is deliberately short.
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