Shoppers in New York City braved the cold on Black Friday in search of good deals ahead of the holiday season. Traditionally, Black Friday kicks off the holiday shopping season, but with six fewer days this year, it will be the shortest season since 2013 because Thanksgiving fell on the fourth Thursday in November. Adobe Analytics predicts a loss of $1 billion in online revenue from a shortened season. Still, it expects online sales will reach $143.7 billion, up 14.1% from last year's holiday season.