Missed out on Black Friday? There are three more big events coming.

American shoppers spent record amounts on Black Friday ($5 billion) and Cyber Monday ($6.59 billion), but this year's calendar has yielded one additional shopping day than last, and there are a number of opportunities left for retailers to get in on the action, including three big retail event days: Green Monday (Dec. 11), Free Shipping Day (Dec. 15) and Super Saturday (Dec. 23).