A decade ago, November 11th was a tongue-in-cheek cultural “celebration” of single people in China. In 2009, retailer Alibaba turned the day into the country’s version of Black Friday — and eight years later, sales from the Chinese e-commerce’s one-day event has nearly doubled those from Black Friday and Cyber Monday in the US combined.

Alibaba hit a record $18 billion in just 13 hours.

Alibaba reported that sales from Single' Day amounted to $25.3 billion, a 40 percent jump from last year's figures. (The number did not take into account some sales that began earlier in the week in honor of the event.) Additionally, the retailer hit a record $18 billion in just 13 hours on Saturday, eclipsing last year's record of $17.8 billion in 24 hours.

Market research experts say the massive growth is attributed to retailers competing for a share of consumer spending in China's growing economy. In comparison, US sales between Thanksgiving until Cyber Monday accounted for $12.8 billion in 2016.

Just like US versions of the shopping holidays, Alibaba offered discounts on a variety of goods, from household items to electronic gadgets to clothing to beauty supplies.

Revenue also came in the form of “virtual shopping cart space,” where customers can pay for expanded cart capacity. The Sixth Tone reports that Chinese retailers traditionally put a limit on how many items you can put in your online shopping cart to help “ease operations,” encouraging buyers to put in one purchase order rather than multiple transactions that require more processing.

In honor of the event, Alibaba founder Jack Ma held a gala to celebrate its kickoff, with celebrities like Pharrell, Nicole Kidman, Jessie J, and Maria Sharapova in attendance. It was televised on both Alibaba’s video service and on three Chinese TV networks.