Holiday retail ecommerce spending for the first 43 days of the November - December 2009 holiday season was up 4% compared to the corresponding days last year, according to ComScore, reaching nearly $21 billion spent online. The week ending December 13 reached $4.74 billion in spending, making it the heaviest online spending week on record. The previous high of $4.70 billion occurred during the week ending December 16, 2007.

According to the research firm, eBay and PayPal suggested in 2007 that online spending actually peaks on the second Monday in December, and dubbed this event "Green Monday." ComScore said this year, Green Monday (which fell on December 14) was likely to be the heaviest online spending day of the year and perhaps of all-time. The company will release this year's Green Monday total later in the week.