Amazon.com Inc. AMZN, +0.66% said Tuesday this year's "Digital Day" will be on Dec. 28, the third annual event providing savings of up to 80% on digital content. The deals will include saving up to 75% on best-selling books for its Kindle e-reader, up to 80% off some best-selling Marvel graphic novels, up to 60% off some digital magazines and savings of up to 65% on movies for Prime members. The digital sales day comes after the e-commerce giant said this year's Cyber Monday was the biggest selling day in its history. The stock was up 1.5% in premarket trade. It has lost 22% over the past three months, while the S&P 500 SPX, +0.29% has shed 12%.