Carinthian national holiday in Austria
Carinthian national holiday in Austria is held on October 10. Dedicated to the referendum 1920. This event in the first decade of the month October is annual. 
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Carinthia is probably Austria's best kept secret: a beautiful province with over 200 splendid lakes that speckle a landscape marked by high peaks and gouged valleys. Perfect slopes and great snow conditions for skiing trips, plus top spa and wellness hotels for summer retreats, make this province an Austrian paradise in any season.
After the defeat of the multi-ethnic Austria-Hungary and the ruling Habsburg dynasty in World War I, new states arose in its former territory. The Carinthian plebiscite was held on 10 October 1920 in the area predominantly settled by Carinthian Slovenes. It determined the final southern border between the Republic of Austria and the newly formed Kingdom of Serbs, Croats and Slovenes (Yugoslavia) after World War I.
Similar holidays and events, festivals and interesting facts
Confucius Day on October 8 (Confucius' birthday falls on the 27th day of the eighth lunar month according to the Chinese calendar);
Dashahara on October 10
Festival of the Sikh Holy Book on October 20
Blessed Charles of Austria on October 21 (Roman Catholic Church);
International Pronouns Day on October 21
Austrian Sparkling Wine Day on October 22
National Day in Austria on October 26 (celebrates the anniversary of the Declaration of Neutrality in 1955)