Which retail data analytics milestone holds the Guinness World Record for 'largest analysis of shopping behavior in a single day'?

The retail industry has achieved some remarkable world records over the years. From the largest shopping malls to the most expensive products ever sold, retail operations have pushed boundaries and set incredible benchmarks. This trivia question focuses on retail data analytics and how they've been used to track extraordinary consumer behaviors. Test your knowledge about extreme retail statistics that have made their way into the record books!

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Alibaba's Singles' Day 2019 analysis tracking over 544 million unique shoppers across 200+ countries in 24 hours
Amazon Prime Day 2020 tracking 372 million customer interactions across 18 websites
Black Friday 2018 analysis by IBM tracking 241 million unique shoppers across 42 retail chains
Walmart's 2021 holiday season analysis processing data from 485 million transactions in 27 countries