International Optimist Dinghy Association
Calendar
Continent
Type
Argentina
Bourgas, Bulgaria
International
Europe
Palic, Serbia
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South East European Open Optimist Cup
Sailing club Palic
Palic, Serbia
International
North America
Drakes Channel, British Virgin Islands
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BVI Dinghy Championships
Royal BVI Yacht Club
Drakes Channel, British Virgin Islands
Netherlands
International
Europe
Venice, Italy
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Rizzotti Trophy
Compagnia della Vela & Diporto Velico Veneziano
Venice, Italy
Constanta, Romania 
Denmark
International
Europe
Kiel-Schilksee, Germany
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Goldener Optimist
Turn-und Sportverein Schilksee, Sailing Department
Kiel-Schilksee, Germany
Türkiye
