https://www.gamespot.com/articles/xbox-one-huge-2017-holiday-game-sale-is-live/1100-6455796/

As expected after services like the PlayStation Store and Steam launched their respective holiday sales, Microsoft has followed suit. The Countdown to 2018 sale is now live on the Xbox Store, discounting hundreds of games for Xbox One and Xbox 360. All of these are available now, but there will also be a new daily deal rotated in every day to keep players checking in frequently.