The 20-Point Checklist to Prepare Your Store For The Holiday Season If there’s anytime of year that strongly impacts Ecommerce sales and marketing, it’s the holidays. In fact, holiday sales alone takes place over 21.2% of total retail sales in 2016, increased by 17.2% compared with 2015. It’s big business, and getting bigger all the time. While there was a falling off in 2009, due to the Great Recession, holiday sales have been growing each year ever since. Take a look at this graph to have an overview of the past years’ trend during the holiday in the USA: