Green Monday

Green Monday takes place on the second Monday in December and is typically one of the busiest retail days in the US—usually because it's the day shoppers realize there are only 10 shipping days before Christmas.

The urgency usually prompts people to rush to their holiday shopping lists and start making purchases.

It was actually a concept coined by eBay in 2007 as a way to advertise their biggest sales day of the month. Since then, other retailers have followed suit and adapted it as a way to guarantee customers they'll get their gifts in time for the holidays.

Plenty of big retailers take part every year, but there's no reason ecommerce merchants can't take advantage too. Green Monday sales usually begin at midnight and run for 24 hours so let your customers know in the lead-up and remind them it's the last opportunity for guaranteed delivery to create hype.