World Champagne Day
World Champagne Day is held on October 20. Celebrated on the penultimate Friday of October. This event in the second decade of the month October is annual. 
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Official hashtag: #ChampagneDay #WorldChampagneDay
You'll be able to meet the wine ambassadors, who will share their knowledge for the magic grape.
Champagne was created by accident – It originated in a cold area in France and this cold weather would interrupt the fermentation process. When warmer weather returned the fermentation process would start again – resulting in fizzy wine. Winemakers would try and halt this secondary fermentation process to no avail and thus, Champagne was born.
Similar holidays and events, festivals and interesting facts
International Pinotage Day on October 14 (Celebrated on the second Saturday of October);
Austrian Sparkling Wine Day on October 22
International Carignan Day on October 26 (Celebrated on the last Thursday in October);
International Xinomavro Day on November 1
International Merlot Day on November 7
International Tempranillo Day on November 9 (Celebrated always on the 2nd Thursday of November);
Winegrower and Winemaker's Day in Ukraine on November 12 (Celebrated on the second Sunday of November)