Which traditional cultural practice led to the creation of China's 'Singles' Day' (November 11), now the world's largest shopping event with over $74 billion in sales?

Around the world, retail experiences are deeply influenced by cultural traditions and customs. Some shopping practices have evolved into significant cultural events, driving unique marketing strategies and consumer behaviors. This trivia tests your knowledge about how traditional cultural practices have shaped distinctive retail phenomena globally. How well do you understand the intersection of cultural traditions and retail innovation?

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University students celebrating being single by exchanging small gifts on 11/11 (all ones representing singles)
Ancient lunar calendar marking the day when single people would visit temples to find potential matches
Post-harvest festival where unmarried farmers would showcase their year's bounty to attract partners
Government-established holiday to boost consumer spending during retail low season