The Amazon Big Billion Days sale in 2023 started on October 8. This was the same start date as Flipkart's Big Billion Days sale in 2023. Amazon Prime members got early access to the sale starting 24 hours before the general public, i.e., from October 7 at midnight. The sale ran during the festive season leading up to Diwali and offered significant discounts across many categories, including electronics, smartphones, and appliances.