Which geographic region originated Singles' Day (11.11), now the world's largest 24-hour shopping event that influences global supply chain patterns?

The world's largest shopping festivals generate billions in revenue and reshape global retail patterns. These events have become cultural phenomena that influence geographic retail distribution, supply chain networks, and consumer behavior across different regions. Test your knowledge of how these massive commercial events began and how they've transformed the retail landscape in their home countries.

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China (Hangzhou), when Alibaba transformed a university holiday into a shopping festival in 2009
United States (Seattle), when Amazon created a counter-event to Black Friday in 2011
India (Bangalore), when Flipkart launched its first Republic Day sale in 2008
South Korea (Seoul), when Coupang established its Thanksgiving shopping festival in 2010