According to comScore, holiday season retail e-commerce spending for the first 48 days of the November – December 2011 holiday season till December 18 saw online spending touch nearly $32bn, an increase of 15% compared to the same period last year.

The week ending December 18 saw four individual days surpassing $1bn in sales. It reached $6.3bn in online retail spending, up 14% from the corresponding week last year, which is a record in itself, the research firm said.

Earlier, the record online spend for final shopping weekend before Christmas reached $1.04bn.

comScore chairman Gian Fulgoni said the final big week of online holiday shopping remained strong throughout, with four days surpassing $1 billion in sales and the second heaviest online shopping weekend on record. "In total, we will see another $5 or $6 billion in e-commerce spending over the remainder of December to finish off what has clearly been an outstanding season for online retailers," Fulgoni added.

There have been ten online spending days tipping $1bn this holiday season, of which Cyber Monday (Nov. 28) currently ranks as the heaviest online spending day of the season at $1.251bn. Monday, December 5, ranks second at $1.178bn, followed by Green Monday (Dec. 12) at third spot with $1.133bn. Free Shipping Day (Friday, Dec. 16) is ranked sixth at $1.072bn.