Which major shopping event was named after a mythological concept and has become one of the world's largest retail phenomena?

Throughout history, mythology and folklore have inspired countless marketing campaigns and retail strategies. From Nike's winged goddess of victory to Starbucks' siren from ancient maritime tales, brands have leveraged powerful mythological symbols to create memorable identities. This trivia question explores how a major online retailer used Norse mythology in a strategic way that revolutionized the e-commerce landscape. Test your knowledge of how ancient stories influence modern shopping experiences!

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Amazon Prime Day (named after the Greek Titans, the Amazons)
Alibaba's Singles' Day (named after the Chinese folk tale of the Cowherd and Weaver Girl)
eBay Super Sale (named after the Roman deity Mercury, god of commerce)
Walmart Thunderbolt Deals (named after Zeus's lightning bolt)