New York (CNN) This year's Black Friday shaped up to be the biggest yet. Americans spent $7.4 billion online on Black Friday and $4.2 billion on Thanksgiving Day.

With Thanksgiving landing six days later than last year, retailers amped up their advertising and served up deep discounts on items such as appliances, sporting goods, televisions, consumers and toys, according to Adobe Analytics.

"We've got a shorter holiday selling season," Jason Woosley, Adobe's vice president of commerce product and platform, told CNN Business earlier this week. "That's creating a compression effect."

was also the biggest day ever for mobile sales, as $2.9 billion came from smartphones. People are getting more comfortable with buying online and on smaller screens. Consumers spent $11.6 billion online over the two days. Fridaywas also the biggest day ever for mobile sales, as $2.9 billion came from smartphones. People are getting more comfortable with buying online and on smaller screens.

Black Friday brick-and-mortar sales were up 4.2%, with the greatest increase over normal shopping activity seen across electronics and appliances, sporting goods, and clothing and shoes, according to data compiled by Fiserv.

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