Green Monday is a booming retail sales opportunity for eCommerce businesses. eBay really started the whole idea. The major online marketing realized that the second Monday in December, on average, was one of the top shopping days in December.
When is it?
Green Monday is the second Monday in the month of December. This year, that’s December 9, 2019. This is the perfect time for online shoppers because it ensures that they’ll have enough time to have their online purchases delivered in time for the holidays.
Reference: What is Green Monday?