This years' Xbox Live Black Friday Sale is now up for Gold subscribers and will be available to everyone on the November 22. The sale ends on November 28.
Some choice picks that I noticed are a Battlefield 1 and Titanfall 2 bundle for €75, The Master Chief Collection for €15, Rare Replay for €9,99, The Witcher 3 for €20 and so on. Keep in mind that the sale also applies to backwards compatible 360 games like Red Dead Redemption, Trials HD, Alan Wake etc. Play Anywhere titles like Gears of War 4, Forza Horizon 3 and Recore will be on sale as well at some point during the week, so interested PC users should also keep a look-out.
EDIT: Fixed the title. I was a little too hopeful that we'd be out of 2016 already.