 Four of the largest 11 online shopping days in 2005 were December 11 to 16, with an increase of 12% over 2004 figures.In 2011, Cyber Monday was slightly busier than Green Monday and Free Shipping Day, although all three days registered sales of over US$1 billion, and all three days registered gains ranging from 14% to 22% over the previous year.Analysts had predicted the peak on December 12, noting that Mondays are the most popular days for online shopping during the holiday shopping season, in contrast to the middle of the week during the rest of the year.