The last major online shopping day of the year, also known as Green Monday, is fast approaching, but retail experts warn that consumers should prepare for more shipping delays this year due to the pandemic.

Created by eBay in 2007, Green Monday is the second Monday in December when many retailers offer last-minute discounts and deals for last-minute shoppers. This year, Green Monday falls on December 14, but that doesn't mean you have to wait until then to shop.

“It’s unclear whether that will still be a ‘last day’ for some people, given that we’re going to see some variation across retailers this year,” Katherine Cullen, the senior director of industry and consumer insights at the National Retail Federation (NRF), told Lifewire in a phone interview. “What we’re advising people to do is shop early this year, especially if you’re shopping online.”

While Black Friday and Cyber Monday are much more popular and profitable than Green Monday, this last-minute shopping holiday is aimed at shoppers looking for the last deals and discounts of the holiday shopping season.